An envelope (or email) from CPC arrives 3-9 months after you filed. Subject: "Intimation under section 143(1) of the Income-tax Act, 1961". First-filer panic sets in. 95% of 143(1) notices are routine: "your numbers match ours, refund cheque enclosed" or "minor mismatch, here is the adjusted tax". The remaining 5% need a careful 30-day response. Missing the window forfeits your right to correct. Reading the intimation's structured format is a skill; once learned, the 143(1) anxiety evaporates.
By the end, you will know how to read a 143(1) intimation, the four possible outcomes, the response windows for each, and how to distinguish 143(1) from the more serious 143(2).
Four outcomes
No difference + refund. Inbox, no action, wait 10-15 days for credit.
No difference + demand for tax (because ITR calc mismatched with TDS reported). Pay within 30 days or file online response.
Difference in computation flagged. Department has adjusted figures; respond via online rectification under section 154.
Defective under 139(9). ITR has a structural error (wrong form, missing mandatory schedule); refile within 15 days.
The first page of the intimation has a clear summary: "Tax payable / refundable" and "Computed tax vs return tax". If there is a difference, page 2 shows the itemised breakdown. Which deduction was disallowed, which TDS was adjusted, which interest was added. Read this before filing any response; the explanation is usually on the record.
The 30-day clock
Any demand raised in 143(1) gives you 30 days to either pay or file an online response contesting the computation. Ignoring the 30-day window triggers interest under section 220(2) at 1% per month from the original demand date, plus potential recovery proceedings. The response is via the e-filing portal. "Respond to Outstanding Demand" section. Not email or physical letter.
Common dispute grounds: (a) TDS not properly reflected in 26AS at time of CPC processing but now available, (b) deduction claim was supported by documents not uploaded initially, (c) CPC mis-captured a figure (input error by system). Each has a specific rectification path under section 154. File respond-to-outstanding-demand first; if CPC does not respond in 30 days, escalate to section 154 rectification.
How to respond online
Login to incometax.gov.in to "e-Proceedings" to "View All Notices" to select the 143(1) intimation to "Submit Response". Upload supporting documents (Form 16 revised, 26AS screenshot, proof of deductions). Submit. Acknowledgement is instant; CPC re-processes within 30-60 days typically. If the response is accepted, a fresh intimation under 154(4) supersedes the original. If rejected, the path escalates to CIT(A) under section 246A.
Do not mistake 143(1) for 143(2)
143(1) is automated processing (CPC-generated, low stakes). 143(2) is MANUAL SCRUTINY. Far more serious, 6-12 month timeline, requires hearing before the Assessing Officer, documents examined in detail. The subject line explicitly says "scrutiny" or "section 143(2)". Different escalation path entirely. Engage a CA for 143(2).
Do not mistake 143(1) for 143(2)
143(1) is automated processing. 143(2) is manual scrutiny. Far more serious, 6-12 month timeline, requires AO hearing. The subject line will tell you which. Engage a CA for 143(2).
139(9) defective return
Return is "defective" when wrong form used (e.g., ITR-1 with capital gains), mandatory schedule missing, or critical field empty. Refile within 15 days using correct form. Delay beyond 15 days = return treated as invalid, late-fee kicks in.
The "TDS later updated" fix
Common scenario: deductor filed Q4 TDS return late, your 26AS did not show full TDS at time of CPC processing to demand raised. Once TDS appears in 26AS, file rectification under 154 citing updated 26AS. Usually accepted; refund issues.
Key Takeaways
143(1): automated processing notice. 95% routine refunds or minor adjustments.
30 days to respond to any demand; interest under 220(2) starts thereafter.
Respond online via e-filing portal to "e-Proceedings".
139(9) defective to refile within 15 days.
Distinguish 143(1) automated from 143(2) scrutiny. Different stakes, different response tracks.
Read Next
If you found an error AFTER filing, the revised return under 139(5) is your fix. If the original was on time. If not, updated return (ITR-U) takes over at a penalty premium.
