A proposed adjustment notice 143(1)(a) is issued by the Centralised Processing Centre (CPC) when the Income Tax Department detects discrepancies in your filed return. It is not a penalty or a final assessment but an opportunity to review the discrepancy and respond before any changes are made to your return.
Why businesses receive a proposed adjustment notice 143(1)(a)
The notice is triggered by mismatches or errors identified during automated processing. Common reasons include:
Arithmetic errors: Calculation mistakes in income, tax or deductions can prompt adjustments.
Incorrect claims: Deductions claimed beyond allowable limits or internal inconsistencies within the return.
Mismatch with tax records: Income reported in the ITR does not match data in Form 26AS, Form 16/16A or the Annual Information Statement (AIS). This is one of the most frequent triggers.
Disallowed deductions or expenses: Deductions may be disallowed due to late filing or non-eligibility under applicable tax provisions.
Unreported income: Income appearing in tax records but absent from the return may be added during adjustment.
When and how you receive the notice
The proposed adjustment notice 143(1)(a) is issued after ITR filing, during automated processing at the CPC. You are required to respond within 30 days of receipt. If no response is submitted within this period, the department proceeds with the proposed adjustments automatically.
How to respond to a proposed adjustment notice 143(1)(a)
Responding correctly is critical to avoid unnecessary tax liabilities. Here’s a step-by-step approach:
- Review the notice carefully
Check the nature of the discrepancy, the amount involved and the supporting data the department has used.
- Compare with your records
Match the figures in your ITR against official tax records and your books, focusing on:
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- Income: Confirm it matches AIS and Form 26AS
- TDS/TCS: Verify credits against Form 16/16A and Form 26AS
- Turnover/receipts: Check against books and GST returns, if applicable
- Deductions/expenses: Confirm eligibility and amounts
- Tax calculation: Recheck total income and tax payable
- Losses: Validate carry-forward and set-off claims
- Choose your response
You have two options:
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- Agree with the adjustment, accept the changes and pay any additional tax due
- Disagree with the adjustment, provide justification and upload supporting documents
- Submit your response and track status
Log in to the income tax e-filing portal and respond under the relevant section. Monitor the response status and await the final intimation.
What happens after you respond?
If your explanation is accepted, no adjustments are made. If it is rejected, the department applies the adjustment and issues a final intimation, which determines either the refund amount or additional tax payable.
Impact of proposed adjustment notice 143(1)(a) on businesses
Beyond the immediate tax liability, a proposed adjustment notice 143(1)(a) can have broader consequences:
- Cash flow disruptions: Unexpected tax demands affect working capital planning.
- Loss of deductions: Incorrectly justified claims may result in permanent disallowance.
- Increased scrutiny: Repeated discrepancies may invite deeper scrutiny or audits in subsequent years.
How to avoid a proposed adjustment notice 143(1)(a)
Businesses can minimise the risk of receiving such notices by following these best practices:
- Reconcile before filing: Match income, tax credits and transactions in your books exactly against Form 26AS and AIS before submitting your ITR.
- Validate deductions: Ensure every deduction is permissible under tax rules, within specified limits and supported by documentation.
- File accurate returns: Double-check income heads, TDS details and carry-forward losses before submission.
- Maintain Documentation: Keep records of income, expenses, invoices, TDS certificates, bank statements and deduction proofs readily available.
- Use reliable accounting software: Reduces the risk of manual calculation errors in filings.
Common mistakes to avoid
When handling a proposed adjustment notice 143(1)(a), businesses frequently make these errors:
- Missing the 30-day response deadline
- Accepting incorrect adjustments without reviewing them
- Failing to upload supporting documents with the response
- Not reconciling AIS and Form 26AS before responding
Conclusion
Responding to a proposed adjustment notice 143(1)(a) correctly and on time prevents unnecessary tax demands and protects legitimate deductions. Businesses that handle such notices systematically also build stronger compliance practices that reduce the likelihood of future notices.
TallyPrime helps reduce filing errors by maintaining accurate financial records, generating reliable reports and supporting accurate GST filings, making it easier to stay reconciled and compliant year-round.
