FY 2025-26 Year-End Checklist: Navigating the New Income Tax Rules 2026

As we approach March 31, 2026, the Indian business landscape is standing at a historic crossroads. This isn't just another financial year-end; it is the final countdown before the Income Tax Act 1961 is officially replaced by the Income Tax Act 2025 and the newly notified Income Tax Rules 2026.

For SMEs, startups, and taxpayers in Varanasi and beyond, staying compliant requires more than just filing returns—it requires a strategic transition. At Sagar S Gupta & Co, we have identified the five critical areas you must address before the clock strikes midnight on March 31st.

1. The "Big Shift": Preparing for April 1, 2026

From the next fiscal year, the "New Tax Regime" becomes even more deeply embedded as the default. Key changes in the 2026 Rules include:

• Enhanced Standard Deduction: Increased to ₹75,000 for salaried individuals under the new regime.
• Rationalized Perquisites: Significant updates to how company-provided cars, house rent, and interest-free loans are valued and taxed.
• Digital Presence: New "Significant Economic Presence" rules for digital businesses crossing ₹2 crore in transactions.

2. Mandatory GST Reconciliations

Before closing your books, ensure your GSTR-1, GSTR-3B, and GSTR-2B are perfectly aligned.

• The 180-Day Rule: Under Rule 37, you must reverse Input Tax Credit (ITC) if you haven't paid your vendors within 180 days. Use this week to clear pending payments or prepare for reversals.
• E-Invoicing Threshold: If your turnover crossed ₹5 crore in FY 2025-26, you must transition to mandatory E-Invoicing starting April 1.

3. Advance Tax & Updated Returns (ITR-U)

March 31 is the absolute final deadline to file Updated Returns (ITR-U) for AY 2023-24. If you discovered an error or omitted income from two years ago, this is your last chance to rectify it and avoid heavy litigation. Additionally, ensure any remaining Advance Tax liability is cleared to avoid interest under Sections 234B and 234C.

4. Audit Trail & Electronic Books

Under the new 2026 framework, there is a heightened focus on "Digital Transparency."

• Ensure your accounting software maintains an uneditable audit trail.
• Verify that your electronic backups are accessible within India, as mandated by the new data localization norms for financial records.

5. NGO & Startup Specifics

For our NGO clients, ensure your Form 10BD (Statement of Donations) is ready for filing. For startups, March 31 is the deadline to ensure your share valuation reports are compliant with the new "Fair Market Value" (FMV) formulas introduced in the 2026 rules.

Also Read: 2026 Compliance Checkup: Navigating New GST Rules and the Income Tax Shift