Section 143(1)(a) notice: proposed adjustment, reply and documents
When to reply
Respond on the e-filing portal within 30 days of the notice, agreeing or disagreeing with reasons.
If it's missed
With no response in time, the return is processed with the adjustment made.
What to collect from the client
- 1
Form 16 / Form 16A
From every employer and from clients who deducted TDS.
- 2
AIS and Form 26AS
Download from the income tax portal (AIS → Download PDF).
- 3
Proof for the proposed adjustment
Documents supporting what you claimed in the return.
- 4
Do you agree with the proposed adjustment? question
Tell us if it's right, or why not.
General guidance, not legal advice. Every notice is different: go by the section, dates and instructions in the notice itself. Check its DIN with the Authenticate notice/order service on the income tax portal. Section numbers here are from the Income-tax Act, 1961; the Income-tax Act, 2025, in force from 1 April 2026, numbers them differently, so a newer notice may cite another section.
Other income tax notices
Track this notice to its reply-by date
Upload the notice and IntegralChase reads the section, PAN or GSTIN, year, DIN and reply-by date, reminds you 7, 3 and 1 day before, and sends the client this list in one click. First month free, no card.