Student
1174 Points
Joined July 2012
1. You should lodge the claim for TDS at the time of filing return either in the original return or revised return.
The time limit for filing revised return is one year from the end of assessment year.
Moreover belated returns filed after due date can't be revised.
2. The deductor are obliged to deduct TDS only at the rates specified in the act.
3. Sorry. Not sure whether any case laws have set precedent.