India tax deadlines 2026.
Every individual and self-employed income tax deadline for India in 2026. Plus recurring VAT / GST / sales tax filings. Each deadline links to notes on how to file, what people miss, and matching open-source tax skills.
Annual deadlines
1 this yearOpen-source skills for India
Prepare this return with open-source skills
These skills are in the OpenAccountants repo. Clone them into Claude, Cursor, or any AI agent and they handle the computation.
Use this skill whenever asked about Indian advance tax for self-employed individuals, freelancers, or professionals. Trigger on phrases like "advance tax India", "advance tax instalments", "Section 234B", "Section 234C", "Challan 280", "advance tax due dates", "interest on late advance tax", "presumptive tax instalment", "estimated tax India", or any question about advance tax obligations under the Income-tax Act 1961. This skill covers the quarterly instalment schedule, presumptive taxation single instalment, threshold, interest for shortfall under s.234B and s.234C, senior citizen exemption, Challan 280 payment procedure, TDS credit interaction, and edge cases. ALWAYS read this skill before touching any advance tax-related work for India.
Use this skill whenever asked to prepare, review, classify, or advise on India's Goods and Services Tax (GST) for a self-employed individual, freelancer, or small business. Trigger on phrases like "GST return", "GSTR-1", "GSTR-3B", "GSTR-9", "file GST", "GST classification", "HSN code", "SAC code", "input tax credit", "ITC", "reverse charge", "e-invoicing", "e-way bill", "CGST", "SGST", "IGST", "inter-state supply", "intra-state supply", "place of supply", or any request involving Indian indirect tax compliance. This skill covers regular (non-composition) GST-registered taxpayers with a single state GSTIN only. Composition scheme, multi-state, SEZ, e-commerce operator, and ISD registrations are in the refusal catalogue. ALWAYS read this skill before touching any India GST work.
Final orchestrator skill that assembles the complete India filing package for India-resident self-employed individuals and professionals. Consumes outputs from all India content skills (india-gst for GSTR-3B/GSTR-1, in-income-tax for ITR-3/ITR-4, in-advance-tax for quarterly instalments, in-tds-freelance for TDS reporting) to produce a single unified reviewer package containing every worksheet, every form, every brief section, all cross-skill reconciliations, and the final action list with payment instructions, filing instructions, and next-year planning. This is the capstone skill that runs last and produces the final deliverable. MUST be loaded alongside all India content skills listed above. India full-year residents only. Self-employed individuals and professionals only.
Use this skill whenever asked about Indian income tax for self-employed professionals, freelancers, or sole proprietors. Trigger on phrases like "how much tax do I pay in India", "ITR-4", "ITR-3", "Sugam", "Section 44ADA", "Section 44AD", "presumptive taxation", "new tax regime", "old tax regime", "advance tax India", "TDS credit", "PAN", "80C", "80D", "income tax return India", "surcharge", "health and education cess", "UPI income", "Razorpay payout", "Paytm business", or any question about filing or computing income tax for a self-employed individual in India. This skill covers new regime vs old regime rate tables, presumptive taxation (44ADA for professionals, 44AD for business), regular computation (ITR-3), surcharge, cess, standard deduction, Section 80C/80D deductions, advance tax schedule, TDS credits, PAN requirements, and ITR-4 (Sugam) structure. ALWAYS read this skill before touching any Indian income tax work.
ALWAYS USE THIS SKILL when a user asks for help preparing their India tax returns AND mentions freelancing, self-employment, contracting, professional services, or independent practice. Trigger on phrases like "help me do my taxes", "prepare my ITR", "I'm self-employed in India", "I'm a freelancer in India", "do my taxes as a consultant", "prepare my income tax return", or any similar phrasing where the user is an India-resident self-employed individual needing tax return preparation. This is the REQUIRED entry point for the India self-employed tax workflow -- every other skill in the stack (india-gst, in-income-tax, in-advance-tax, in-tds-freelance, in-return-assembly) depends on this skill running first to produce a structured intake package. Uses upload-first workflow -- the user dumps all their documents and the skill infers as much as possible before asking questions. Uses ask_user_input_v0 for structured questions instead of one-at-a-time prose. Built for speed. India full-year residents only; self-employed individuals and professionals only.
Preparing a India return?
The OpenAccountants repo has verified, open-source tax computation skills. Clone and run them with your AI agent, then get an accountant to review.