What are the due dates for filing revised tds returns?

31st of subsequent month of Quarter is due date to file return.

If you revise within due date of normal filling then no interest or penalty. If on reveision after due date a liability is raised then such liability needs to be paid with interest and penalty.

Bt wat is the last date by which i can revise my tds return?
N i think there will be only interest liability and no penalty.

Last date of revision is due date of filling return

Yes, Interest only.

For revised return there is no time limit to file
But if liability is raised interest will raise only if there is TDS payment and it is paid now
If the TDS payment is paid earlier and due to any other reason it is going to revise now
Just penalty will change depending on the date of original return filing