Itr-1 not submitting

Since no tds on pension

No TAN required for it

Bank's TAN is enough for filing returns

Sir, You have told "I have some interest income also on which TDS is deducted by the bank."

Hence, you can get Form 16 A- TDS on interest from the Bank for that particular Branch of the Bank. Also, you can get these details of TDS deducted ( Sec 194 A) and TAN of the deductor from Form 26 AS also. Then u  submit your return ,i.e, e filing selecting all the appropriate fields and schedules.

If  you do not know the TAN of  the Bank Branch ,ask them ; they will provide.( If the deposit is held in the same branch, where u are getting the pension, then TAN will be same. Or if it is a different branch of the same Bank, they will help you to get the TAN.