Hello Nandakumar,
Answers for your queries are as follows
1. Unfortunatley option is not available, however you can get it done by directly entering the remaining value to be set off in the respective assessment year
For example, in your case the remaining amount to be set off is Rs. 25, so please enter that amount directly thats it
2. Since you do not have form 16A, you can enter your details in Form 16 itself. While entering the details in form 16, you will find the option of interest income. Just enter your interest income there
3. Tax liability is calculated by considering all source of income, in your case the TDS has been deducted only on salary income. Since advance tax is not paid on interest income, there will be penalty u/s 234/a/b/c to the extent of interest income
With Regards!!!!