A taxpayer faces a tax authority enquiry, audit, assessment, appeal, double-taxation conflict, or considers an advance ruling or APA.
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This Guide is general tax/accounting reference material for AI-assisted workflows. It has not been reviewed for your personal facts, documents, elections, deadlines, residency, filing status, or local procedures. Do not rely on it to file, pay, amend, or take a tax position without review by a qualified professional in the relevant jurisdiction.
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US IRS — Notice of Deficiency appeal window (Tax Court petition)
90 daysInternal Revenue Code (IRC) § 6213
US IRS — Appeals office filing window
30 daysInternal Revenue Code (IRC); IRS Revenue Procedure
US IRS — Standard statute of limitations for assessment
3 yearsInternal Revenue Code (IRC) § 6501(a)
US IRS — Extended statute of limitations for substantial omission
6 yearsInternal Revenue Code (IRC) § 6501(e)
US IRS — Statute of limitations where fraud
UnlimitedInternal Revenue Code (IRC) § 6501(c)
UK HMRC — Standard discovery assessment window
4 yearsTaxes Management Act 1970 (TMA 1970) s.34 / s.29
UK HMRC — Extended assessment window for careless behaviour
6 yearsTaxes Management Act 1970 (TMA 1970) s.36
UK HMRC — Extended assessment window for deliberate behaviour
20 yearsTaxes Management Act 1970 (TMA 1970) s.36
UK HMRC — Window for internal review request
30 daysTaxes Management Act 1970 (TMA 1970); Finance Act 2008 Sch 36
UK HMRC — Window to appeal to Tribunal
30 daysTribunal Procedure (First-tier Tribunal) (Tax Chamber) Rules 2009
Germany — Standard tax assessment limitation period (Festsetzungsverjährung)
4 yearsAbgabenordnung (AO) § 169
Germany — Extended assessment period (extended fraud)
5/10 years (fraud)Abgabenordnung (AO) § 169(2)
Germany — Einspruch (objection) filing window from notice
1 monthAbgabenordnung (AO) § 355
Germany — Klage (court action) to Finanzgericht from Einspruchsentscheidung
1 monthFinanzgerichtsordnung (FGO) § 47
France — Standard reprise (reassessment) period
3 yearsLivre des Procédures Fiscales (LPF) art. L169
France — Extended reprise period for fraud
10 yearsLivre des Procédures Fiscales (LPF) art. L169
France — URSSAF social security audit period
3 yearsCode de la Sécurité Sociale (France)
France — Réclamation contentieuse (tax complaint) filing window
2 years (varies)Livre des Procédures Fiscales (LPF) art. R*196-1
France — Appeal to Tribunal Administratif (TA) from rejection
2 monthsCode de Justice Administrative (France)
Italy — Standard accertamento (assessment) period
5 yearsDecreto del Presidente della Repubblica (DPR) 600/1973; DPR 633/1972
Italy — Extended accertamento period where no return filed
7 yearsDecreto del Presidente della Repubblica (DPR) 600/1973
Italy — Ricorso to Corte di Giustizia Tributaria (tax court appeal)
60 daysDecreto Legislativo 546/1992 art. 21
Spain — Prescripción (limitation period)
4 yearsLey General Tributaria (LGT) art. 66
Spain — Reclamación to TEAR (administrative appeal)
1 monthLey General Tributaria (LGT) art. 235
Spain — Recurso ante TSJ (court appeal)
2 monthsLey de la Jurisdicción Contencioso-Administrativa (LJCA) art. 46
Netherlands — Standard aanslagtermijn (assessment period)
3 yearsAlgemene wet inzake rijksbelastingen (AWR) art. 11
Netherlands — Extended assessment period for foreign assets
12 yearsAlgemene wet inzake rijksbelastingen (AWR) art. 16(4)
Netherlands — Bezwaar (objection) filing window
6 weeksAlgemene wet bestuursrecht (Awb) art. 6:7
Netherlands — Beroep to Rechtbank (court appeal) filing window
6 weeksAlgemene wet bestuursrecht (Awb) art. 6:7
Australia — Standard ATO assessment period
2 years (standard) / 4 years (certain taxpayers)Income Tax Assessment Act 1936 (ITAA 1936) s.170
Australia — Extended period for fraud or international transactions
Extended / unlimited (fraud; international)Income Tax Assessment Act 1936 (ITAA 1936) s.170
Australia — Lodge objection with ATO
60 daysTaxation Administration Act 1953 (TAA 1953) Sch 1 s.14ZU
Australia — Tribunal appeal after objection decision
60 daysTaxation Administration Act 1953 (TAA 1953) Sch 1 s.14ZZ
Canada — Standard CRA reassessment period
3 yearsIncome Tax Act (Canada) s.152(3.1)
Canada — Reassessment period for Canadian-controlled private corporations (CCPC)
4 yearsIncome Tax Act (Canada) s.152(3.1)
Canada — Reassessment period for transfer pricing
7 yearsIncome Tax Act (Canada) s.152(4)(b)(iii)
Canada — Notice of Objection filing window
90 daysIncome Tax Act (Canada) s.165(1)
Canada — Tax Court appeal filing window
90 daysTax Court of Canada Act s.169
Japan — Standard National Tax Agency assessment period
5 yearsNational Tax General Rules Act (Japan) art. 70
Japan — Extended assessment period for fraud
7 yearsNational Tax General Rules Act (Japan) art. 70(4)
Japan — Administrative review filing window
3 monthsNational Tax General Rules Act (Japan)
India — Assessment window (range)
3–10 years depending on caseIncome Tax Act 1961 (India) s.149 / s.153
India — Appeal to CIT(A) filing window
30 daysIncome Tax Act 1961 (India) s.249
India — Appeal to ITAT filing window
60 daysIncome Tax Act 1961 (India) s.253
Brazil — Receita Federal assessment period
5 yearsCódigo Tributário Nacional (CTN) art. 173
Brazil — Impugnação (administrative objection) filing window
30 daysDecreto 70.235/1972 (Brazil) art. 16
Brazil — CARF (administrative appeal tribunal) appeal window
30 daysDecreto 70.235/1972 (Brazil)
US IRS Private Letter Ruling (PLR) — standard fee for income tax matters
USD 39,950IRS Revenue Procedure 2024-1 (or current annual update)
Spain — Advance ruling (consulta vinculante) fee
FreeLey General Tributaria (LGT) art. 88-89
Advance ruling / APA — typical issuance window
6–24 monthsOECD Forum on Tax Administration; various national guidance
APA — typical covered period
3–5 years, renewableOECD Transfer Pricing Guidelines; OECD MEMAP
US IRS APMA — approximate annual bilateral APA completions (2024)
~150 bilateral / ~200 totalIRS APA Program Annual Report 2024 (released February 2025)
US IRS APMA — average bilateral APA cycle time
~40 monthsIRS APA Program Annual Report 2024 (released February 2025)
Japan NTA APA — approximate annual bilateral APA completions (2024)
~100 bilateralJapan National Tax Agency APA Statistics 2024
Japan NTA APA — average cycle time
~36 monthsJapan National Tax Agency APA Statistics 2024
UK HMRC TPS APA — approximate annual completions (2024)
~25HMRC APA Programme Statistics 2024
UK HMRC TPS APA — average cycle time
~30 monthsHMRC APA Programme Statistics 2024
Germany BZSt APA — approximate annual completions (2024)
~30Bundeszentralamt für Steuern (BZSt) APA Statistics 2024
Germany BZSt APA — average cycle time
~30 monthsBundeszentralamt für Steuern (BZSt) APA Statistics 2024
Netherlands APA/ATR Team — average cycle time
~24 monthsBelastingdienst APA/ATR Statistics 2024
India CBDT APA — approximate annual completions (2024, including record FY24)
~60CBDT APA Programme Annual Report 2024
India CBDT APA — average cycle time
~30 months (rolling)CBDT APA Programme Annual Report 2024
MAP — OECD Model Article 25(1): time limit to file MAP case from first notification
3 years from first notification of action resulting in taxation not in accordance with the ConventionOECD Model Tax Convention Article 25(1)
MAP filing limit — United States
3 years from notice (extendable via Form 8833)OECD Model Tax Convention Article 25(1); applicable US bilateral tax treaty
MAP filing limit — Germany
4 yearsApplicable German bilateral tax treaties; OECD Model Tax Convention Article 25(1)
MAP filing limit — Italy
2–3 yearsApplicable Italian bilateral tax treaties; OECD Model Tax Convention Article 25(1)
MAP filing limit — India
3 years from receipt of orderIncome Tax Act 1961 (India) s.90; applicable bilateral tax treaties
BEPS Action 14 — MAP target resolution time
24 months (average)OECD BEPS Action 14 Minimum Standard; OECD MEMAP
OECD MAP statistics 2023 — new MAP cases initiated globally
~3,400OECD MAP Statistics 2023 (released October 2024)
MLI Article 16 — MAP filing window (where MLI applies)
3 years from first notificationMultilateral Convention to Implement Tax Treaty Related Measures (MLI) Article 16
MLI mandatory arbitration — trigger: MAP unresolved period before arbitration can be requested
2 yearsMultilateral Convention to Implement Tax Treaty Related Measures (MLI) Article 19
MLI Part VI mandatory arbitration — approximate number of adopting jurisdictions
~30+ jurisdictionsMultilateral Convention to Implement Tax Treaty Related Measures (MLI) Part VI; OECD MLI matching database
EU DRM — complaint filing deadline from first notification
3 yearsCouncil Directive (EU) 2017/1852 art. 3
EU DRM — Member State acceptance/rejection window after complaint
6 monthsCouncil Directive (EU) 2017/1852 art. 5
EU DRM — MAP phase: Member States' period to reach agreement
2 years (extendable to 3)Council Directive (EU) 2017/1852 art. 4
EU DRM — Advisory Commission independent opinion issuance period
6 monthsCouncil Directive (EU) 2017/1852 art. 14
EU DRM — Final decision by Member States after independent opinion
6 monthsCouncil Directive (EU) 2017/1852 art. 15
EU DRM — transposition deadline for Member States
30 June 2019Council Directive (EU) 2017/1852 art. 22
India GAAR — minimum threshold for application
INR 30 millionIncome Tax Act 1961 (India) Chapter X-A (s.95 et seq.)
US Economic Substance Doctrine — codification year
Codified 2010Internal Revenue Code (IRC) § 7701(o) (enacted via Health Care and Education Reconciliation Act 2010)
Canada GAAR — 2024 amendment strengthening anti-avoidance rules
Strengthened 2024 (Finance Act 2024 amendment)Income Tax Act (Canada) s.245; Budget Implementation Act 2024
DAC3 — EU automatic exchange of cross-border tax rulings
Automatic exchange mandatory for EU Member StatesCouncil Directive (EU) 2015/2376 (DAC3)
OECD MLI — MAP symmetrical access (Article 16): taxpayer can file in either state
Either contracting stateMultilateral Convention to Implement Tax Treaty Related Measures (MLI) Article 16
UK GAAR — legislative basis
Finance Act 2013 Part 5Finance Act 2013 Part 5
EU ATAD GAAR — in force across all 27 EU Member States
Article 6, all 27 EU Member StatesCouncil Directive (EU) 2016/1164 (ATAD) Article 6
OECD MLI Article 7 — Principal Purpose Test (anti-treaty shopping)
Main purpose test for treaty shoppingMultilateral Convention to Implement Tax Treaty Related Measures (MLI) Article 7
Italy Voluntary Disclosure — legislative basis (original and renewals)
Legge 186/2014; renewed 2017, 2023Legge 186/2014 (Italy); subsequent renewal legislation
Germany Voluntary Disclosure — criminal liability extinguishment condition
Before discovery by tax authorityAbgabenordnung (AO) § 371
Canada Voluntary Disclosures Program (VDP) — narrowed (two-tier structure)
Narrowed 2018; two tiers (general, limited)Canada Revenue Agency (CRA) Information Circular IC00-1R6 (Voluntary Disclosures Program)
This file is a content skill that loads on top of cross-border-workflow-base. It implements:
Tax year coverage. Current for calendar 2025, reflecting:
The reviewer is the customer of this output. Controversy and dispute resolution are zero-sum and time-sensitive. Every output must be reviewed by a credentialed tax controversy practitioner (typically a tax lawyer or Big 4 tax controversy specialist) before any submission is filed.
This skill covers:
This skill does NOT cover:
transfer-pricing-workflow-base.mdCountry-specific appeal windows
| Country | Audit-to-assessment window | Time to appeal assessment |
|---|---|---|
| United States — IRS | Statute of limitations 3 yr (6 yr if substantial omission; unlimited if fraud) | 90 days (Notice of Deficiency); 30 days for appeals office; petition Tax Court within 90 days |
| United Kingdom — HMRC | Discovery up to 4 years (careless 6, deliberate 20) | 30 days for internal review; 30 days to Tribunal |
| Germany — Finanzamt | Steuerliche Festsetzungsverjährung 4 years (extended 5/10 for fraud) | Einspruch: 1 month from notice; Klage to Finanzgericht: 1 month from Einspruchsentscheidung |
| France — DGFiP | Reprise: 3 years (10 if fraud); contrôle URSSAF 3 yr | Réclamation contentieuse: 2 yr (varies); TA appeal: 2 mo |
| Italy — Agenzia delle Entrate | Accertamento: 5 yr (7 if no return) | Ricorso to Corte di Giustizia Tributaria: 60 days |
| Spain — AEAT | Prescripción 4 años | Reclamación TEAR: 1 mo; recurso ante TSJ: 2 mo |
| Netherlands — Belastingdienst | Aanslagtermijn 3 yr (12 yr foreign assets) | Bezwaar: 6 wk; beroep to Rechtbank: 6 wk |
| Australia — ATO | Standard 2/4 yr (extended for fraud / unlimited international) | 60 days to lodge objection; tribunal 60 days |
| Canada — CRA | Reassessment 3 yr (4 for CCPC, 7 for transfer pricing) | 90 days for Notice of Objection; Tax Court 90 days |
| Japan — National Tax Agency | 5 yr (7 if fraud) | Administrative review 3 months; tax tribunal further period |
| India — IT Department | 3-10 years depending on case | Appeal to CIT(A) within 30 days; ITAT within 60 days |
| Brazil — Receita Federal | 5 yr | Impugnação within 30 days; CARF appeal within 30 days |
Document production and privilege
| Jurisdiction | Privilege scope |
|---|---|
| US | Attorney-client privilege; federally recognised work product; §7525 federally authorised practitioner privilege (limited, does not extend to criminal) |
| UK | Legal advice privilege (solicitors, barristers) and litigation privilege; tax advice from accountants NOT privileged (Prudential v HMRC) |
| Germany | Anwaltsgeheimnis for lawyers; Steuerberater have limited Beratungsschutz |
| France | Avocats have full secret professionnel including for tax advice (post-Cour de cassation 2022) |
| Australia | Legal professional privilege for lawyers; accountants' concession (limited) |
| Canada | Solicitor-client privilege; accountant communications generally not privileged |
Binding advance ruling regimes
| Jurisdiction | Body | Type | Binding effect |
|---|---|---|---|
| United States — IRS PLR | National Office | Private Letter Ruling | Binds IRS for the requesting taxpayer on the specific facts |
| United Kingdom — HMRC | HMRC Advance Clearances | Pre-transaction clearance | Binding if facts as represented |
| Netherlands | Belastingdienst Rulings Team APA/ATR | ATR (Advance Tax Ruling) | Binding generally |
| Luxembourg | ACD | Décision anticipée | Binding |
| Switzerland | Canton + ESTV | Steuerruling | Binding cantonal + federal |
| Belgium | SDA/BBI | Advance ruling | Binding |
| Ireland | Revenue | Opinion / Confirmation | Quasi-binding |
| Germany | Finanzamt | Verbindliche Auskunft | Binding |
| France | DGFiP | Rescrit | Binding |
| Italy | Agenzia delle Entrate | Interpello | Binding |
| Spain | Dirección General de Tributos | Consulta vinculante | Binding |
| India | AAR | Advance Ruling | Binding for the applicant on the specific transaction |
| Singapore | IRAS | Income Tax Advance Ruling | Binding |
| Australia | ATO Public/Private Ruling | Various | Binding |
| Canada | CRA | Advance Income Tax Ruling | Binding |
| Japan | NTA | Advance ruling on transfer pricing only generally | Limited |
[T1]
APA program leaders
| Country | Program | Annual completions (latest) | Average cycle time |
|---|---|---|---|
| United States — IRS APMA | Advance Pricing & Mutual Agreement Program | ~150 bilateral / 200 total (2024) | ~40 months bilateral |
| Japan — NTA APA Office | Pioneer of bilateral APAs | ~100 bilateral (2024) | ~36 months |
| United Kingdom — HMRC TPS | UK APA Programme | ~25 (2024) | ~30 months |
| Germany — BZSt | Verständigungsverfahren | ~30 (2024) | ~30 months |
| France — DGFiP | APA Cellule | ~25 (2024) | ~36 months |
| Italy — Agenzia delle Entrate | Patent and TP APA | ~30 (2024) | ~36 months |
| Netherlands | APA / ATR Team | ~30 (2024) | ~24 months |
| Australia — ATO | APA Programme | ~30 (2024) | ~30 months |
| Canada — CRA | International Tax Division | ~30 (2024) | ~36 months |
| India — CBDT | APA Authority | ~60 (2024, including signing record year FY24) | ~30 months (rolling) |
Arbitration is typically baseball-style (final-offer) or independent-opinion. Disclosure obligations and confidentiality rules vary by treaty. [T2]
[T1] Council Directive (EU) 2017/1852 (transposed by Member States by 30 June 2019):
Comparison of MAP and EU DRM
| Feature | MAP (OECD) | EU DRM |
|---|---|---|
| Geographic scope | Bilateral | EU-EU |
| Time limit | Typically 24 months (BEPS Action 14) | 2 years extendable to 3 |
| Arbitration | Optional via MLI | Built-in mandatory |
| Taxpayer participation | Limited | Right to be heard; right to choose Advisory Commission |
| Binding effect | Subject to domestic acceptance | Binding on Member States once final |
Major voluntary disclosure regimes
| Country | Programme |
|---|---|
| US | Streamlined Filing Compliance Procedures (offshore); IRS Voluntary Disclosure Practice (general, post-OVDP) |
| UK | Worldwide Disclosure Facility (active); Code of Practice 9 (CDF) for serious fraud |
| Germany | Selbstanzeige (§371 AO) — voluntary self-denunciation can extinguish criminal liability if before discovery |
| France | Service de Traitement des Déclarations Rectificatives (STDR) — closed but historical filings still being processed |
| Italy | Voluntary Disclosure (Legge 186/2014, renewed 2017, 2023) |
| Australia | Project Wickenby legacy; current voluntary disclosure under Practice Statement |
| Canada | Voluntary Disclosures Program (VDP) — narrowed in 2018; two tiers (general, limited) |
| India | Income Declaration Scheme (closed); various amnesty schemes by Finance Acts |
| Brazil | Multiple Regimes (latest 2024 RFB) |
In-force GAARs
| Country | GAAR | Test |
|---|---|---|
| UK | GAAR (FA 2013 Part 5) | "Abusive tax arrangements"; double reasonableness test |
| EU | Article 6 ATAD Directive (in force in all 27 MS) | "Non-genuine arrangement... main purpose / one of main purposes" of obtaining a tax advantage |
| US | Economic substance doctrine (§7701(o)) | Codified 2010; subjective + objective tests |
| Australia | Part IVA Income Tax Assessment Act | "Dominant purpose" of obtaining a tax benefit |
| Canada | Section 245 ITA + recent FA 2024 amendment | "Abusive avoidance transaction" — strengthened 2024 |
| India | GAAR Chapter X-A | Threshold INR 30m; main purpose test |
| Brazil | CTN art. 116 | Anti-abuse; rarely litigated successfully |
| France | Article L64 LPF — abus de droit | Two limbs: fictitious / fraudulent |
| Germany | §42 AO — Gestaltungsmissbrauch | Inappropriate legal structure |
| OECD MLI Article 7 | Principal Purpose Test | Treaty-shopping anti-abuse |
The OECD has not yet finalized a unified Pillar Two dispute resolution mechanism. The IF intends to publish a framework. In the interim, taxpayers should:
[T2]
The reviewer brief must include:
This skill and its outputs are provided for informational and computational purposes only and do not constitute tax, legal, or financial advice. Tax controversy is zero-sum and procedural; every output must be reviewed and signed off by a credentialed tax controversy practitioner before any submission is filed.
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