The Income Tax Act, 2025, came into effect on April 1, 2026, and with it came changes that most taxpayers genuinely underestimated. A month on, the penalties aren't hypothetical anymore. For businesses in Delhi, NRI landlords in Mumbai, and startups in Bengaluru alike, the defaults that happened in April are now hardening into formal liability.
The 2026 framework introduced automated hard-check triggers across TDS, GST, and PAN compliance. Once those systems flag an inconsistency, the window to correct it closes fast.
What Missed Income Tax Compliance in 2026 Actually Means
The term missed income tax compliance 2026 sounds broad, but it has a precise meaning this year. The new Act didn't just tweak rates or thresholds; it replaced the underlying architecture. Forms changed. Section numbering changed. If your April payroll ran TDS under Section 194J instead of the new Section 393 numeric codes (1001–1067), the recipient's tax credit may simply not appear. That mismatch is treated as a short deduction, and the deductor carries the liability.
The 5 Places Where April Went Wrong
1. Form 121 Not Filed
Form 121 is the unified replacement for the old Forms 15G and 15H. It's used by individuals whose income falls below the taxable limit to prevent TDS deductions on interest, rent, and similar receipts. If your clients, tenants, or bank didn't receive this form from you before April's first deduction cycle, that TDS is already gone. You can still submit Form 121 to stop future deductions, but recovering what was already cut requires a refund claim through your tax return.
2. TDS Software Not Updated to Section 393
This caught a large number of payroll teams off guard. The new Act retired familiar section references and replaced them with a tabular structure under Section 393. Payments for professional services, contracts, and technical fees now carry specific numeric codes. Filings that used the old section names caused credit mismatches for recipients and generated short-deduction notices for deductors. A correction statement using the new payment codes, filed before the quarterly deadline, can fix this.
3. Old Form Numbers Used in Payroll
Beyond TDS section codes, the actual forms themselves changed. Form 26 now replaces the old Form 3CD for audit reporting and requires disclosing unreported transactions individually, not in aggregates. Employers and auditors who filed April compliance using the old form structure may face additional scrutiny during assessment.
4. PAN Threshold for Property Transactions Ignored
The mandatory PAN quoting threshold for immovable property transactions has been raised to ₹20 lakh per transaction. Buyers and sellers using the old ₹10 lakh benchmark in April sale deeds are exposed to penalties under Rule 161. Real estate lawyers and registration offices weren't universally updated on this by April 1, which means a significant number of April registrations likely have a compliance gap baked in.
5. GSTR-3B ITC Hard-Checks
Under the 2026 GST framework, the portal auto-populates Input Tax Credit figures and hard-locks them once the GSTR-2B deadline passes. Credit that didn't appear in GSTR-2B because a vendor filed late or incorrectly cannot be manually claimed. Unlike previous years, there's no override. If your vendor's GSTR-1 didn't reflect the invoice in time, you lose that credit for the period. The only path is GSTR-1A amendment by the vendor, followed by re-checking your GSTR-3B for the next cycle.
Who Is Most Exposed
Not every taxpayer carries the same risk profile. April's compliance gaps hit differently depending on the category:
- Employers and payroll teams: highest TDS exposure due to Section 393 migration failures
- SME businesses: manpower supply contracts now explicitly fall under the Section 393 equivalent of old 194C; many skipped the 1–2% deduction entirely in April
- Real estate buyers and sellers: PAN threshold error in registered documents is difficult to retroactively fix
- Businesses with GST vendor chains: ITC hard-lock is unforgiving if even one major vendor is non-compliant
- NRI landlords: Form 121 replacement was underreported in NRI communities; many tenants continued old TDS procedures
What Can Still Be Fixed
TDS correction statements: Deductors can file revised statements with the correct Section 393 numeric codes before the end of the first quarter (June 30, 2026). This will resolve most credit-mismatch notices before they escalate.
GSTR-1A filing: If outward supply errors were made in April, the newly introduced Form GSTR-1A allows amendment before data is hard-locked into GSTR-3B. This is time-sensitive and depends on the vendor acting promptly.
Form 121 submission: Late submission stops future TDS deductions. The April deduction itself needs to be recovered through the ITR refund process.
Condonation applications: For genuinely bona fide errors where the system has already imposed a block, a formal condonation application with supporting documentation is possible. The 2025 Act's Section 400(2) makes CBDT circulars binding on deductors, which tightens the "reasonable cause" argument but doesn't eliminate it for first-instance errors.
What Attracts Unavoidable Penalties
Once May closes without correction, the calculus changes. Willful reporting failures under the 2026 framework attract penalty brackets of up to 200%. The CBDT's shift to a "Tax Year" basis, which replaces the old Assessment Year terminology, also means the compounding timeline runs faster than many practitioners expected.
Some April property registration errors, particularly those involving incorrect PAN documentation, may require fresh documentation and re-filing with the registrar, which is a procedurally complex fix.
As noted by experts at Commercial Law Chamber, the most vital interpretation shift is under Section 400(2), where CBDT circulars are now legally binding on deductors. You can no longer claim a "reasonable cause" defence for ignoring a circular.
City-Specific Pressure Points
Delhi corporates are running into Section 393 migration issues at scale, particularly in contract manufacturing and IT services payments. Mumbai's NRI landlord community missed the Form 121 transition almost entirely. Many are now facing TDS deductions on rental income that should have been exempt. Bengaluru startups with large vendor ecosystems are dealing with ITC hard-lock blocks that are straining quarterly cash flow.
Practical Implications for Businesses
For a Delhi-based corporate or a Mumbai firm, the implications are immediate:
- Cash Flow Strain: Blocked ITC due to vendor non-compliance (GSTR-1 mismatch) cannot be manually overridden.
- Audit Risk: The new Form 26 (replacing 3CD) requires a count of unreported transactions. This forces transparency that was previously hidden in aggregate figures.
For more information on navigating these changes, visit our practice area page.
Frequently Asked Questions (FAQs)
What is Form 121?
Form 121 is the 2026 replacement for Forms 15G and 15H. It allows individuals with income below the taxable threshold to receive payments such as rent or interest without TDS being deducted.
Can ITC be denied even if I paid my supplier?
Yes. The hard-lock system in 2026 denies credit if the supplier hasn't reflected the invoice in GSTR-1, regardless of whether you've paid. For more, see CLC's breakdown of GST input tax credit rules.
What is the new PAN threshold for property?
₹20 lakh per transaction, up from the previous ₹10 lakh threshold.
What happens if I used old TDS section numbers in April?
The portal may fail to map the payment under Section 393, triggering a short-deduction notice and creating a credit mismatch for the recipient.
External Reference:Income Tax Department — Section 393 Overview