id-einvoice-coretaxAccountant-reviewed Use this skill whenever asked about filing, invoicing, or submitting any Indonesian tax obligation through the Coretax DJP system that went live 1 January 2025. Trigger on phrases like "Coretax DJP", "Coretax pajak", "Coretax login", "e-Faktur Indonesia", "e-Bupot Unifikasi", "NSFP", "Nomor Seri Faktur Pajak", "SPT Masa Unifikasi", "Indonesia tax filing system", "DJP Online vs Coretax", "Coretax Form", "Coretax Mobile", "NIK as NPWP", "16-digit NPWP", "pajak.go.id new system", "Coretax onboarding", or any operational query about how to file, issue invoices, or pay tax to the Indonesian DJP from 2025 onward. This skill covers the Coretax platform mechanics, account activation, NIK/NPWP integration, e-Faktur issuance and NSFP management within Coretax, e-Bupot Unifikasi withholding slip workflow, SPT filing channels, and the DJP Online to Coretax cutover. It does NOT compute the underlying tax — VAT (PPN) sits in indonesia-vat, withholding PPh 21 sits in id-payroll-pph21, and corporate / individual income tax sits in their respective skills. ALWAYS read this skill when filing or invoicing through Coretax DJP.