Got a defect notice last year because of an AIS entry I didn't know existed — sharing so others don't make the same mistake
Filing season last year, I did everything I was supposed to. Downloaded Form 26AS, matched TDS with Form 16, entered capital gains from my broker's tax P&L. Filed before July 31, got my acknowledgement, thought I was done.
August. Defect notice from IT department.
Turned out my AIS had an SFT-018 entry for a mutual fund redemption from a folio I'd forgotten about — an old ELSS fund I'd started in 2018, finally hit the 3-year lock-in, and later redeemed. The redemption value was about ₹85,000. I'd completely forgotten this folio existed. It wasn't in the capital gains statement my broker sent me because it was with a different AMC.
The AIS had the entry. My ITR didn't declare it. System flagged it as underreported income.
To fix it I had to file a revised return, which meant going back through the whole process, recalculating gains (purchase NAV vs redemption NAV, LTCG above ₹1L at that time), paying the shortfall tax plus interest under 234A and 234B.
What I should have done: downloaded my AIS before filing and read every SFT entry, not just the TDS entries. Form 26AS didn't have this. AIS did.
**How to get your AIS:** [incometax.gov.in](http://incometax.gov.in) → login → AIS/TIS tab → download PDF. Password: your PAN in lowercase + date of birth in DDMMYYYY format. So if PAN is ABCDE1234F and DOB is 5 March 1985, password is abcde1234f05031985.
What to specifically look for in the SFT section:
Cross every SFT entry against your own records. If you have investments scattered across platforms, this is where the gaps show up.
July 31 is less than 4 weeks away. If you haven't looked at your AIS yet — do it before you file, not after.
Happy to answer questions if anyone has specific AIS entries they're confused about.