Income Tax
Income Tax Due Dates AY 2026-27 (FY 2025-26): Full List
All income tax due dates for AY 2026-27 / FY 2025-26 — ITR filing, tax audit, TDS returns and advance tax — with exact forms, thresholds and dates.
7 min
Income Tax
How CA firms run ITR filing, TDS returns, advance tax and tax-audit deadlines — and what practice software should handle for each.
Income tax is the seasonal backbone of most Indian CA practices. Unlike GST, the work clusters into sharp peaks — the July filing rush, the September audit deadline, four quarterly TDS cycles — and each peak carries clients whose data arrives late and whose penalties land on the firm’s reputation, not theirs. Managing it well is less about tax knowledge and more about tracking who owes what, by when, across the entire client base at once.
The income-tax deadlines a practice tracks
The calendar is fixed and unforgiving. ITR for non-audit cases is due 31 Jul; where a tax audit under 44AB applies, the report is due 30 Sep and the return 31 Oct. TDS returns — 24Q, 26Q and 27Q — fall on 31 Jul, 31 Oct, 31 Jan and 31 May, and advance tax instalments hit on 15 Jun, 15 Sep, 15 Dec and 15 Mar. Each return also needs a valid UDIN and, for audit sign-off, a current DSC. Miss one quarter for one client and the late fee, interest and explanation are all the firm’s to absorb.
What to look for in software for income-tax work
The features that earn their place are per-client recurring tasks that regenerate each period, a compliance calendar that separates audit from non-audit clients, and reminders that reach staff and clients ahead of the deadline. Document handling matters during peak season — Form 16, capital-gains statements and bank data need filing against the right client and assessment year. A client portal cuts the email chase by letting clients upload data and confirm figures directly. Our independently top-ranked tool, QwikCA, auto-generates TDS and ITR tasks, tracks DSC expiry and UDIN, and sends WhatsApp plus email reminders; note it tracks DSC rather than signing returns in-app and has no dedicated statutory-audit module.
How it fits the wider practice
Income tax shares clients, staff and a single calendar with GST and ROC work, so a system that keeps it as one isolated module quickly drifts out of sync. Compare how the leading tools handle the overlap in the rankings, or work through fit before committing with our guide to choosing CA practice management software.