TDS deduction on Fixed Term Deposit

I have Fixed Deposit in a Co-operative bank since last 15 years. The same is going to mature in the current financial year. The bank has not deducted any TDS amount till date. I want to know when the same matures this year, will I be getting the amount…

…after TDS deductions for the last 14 years?

OR

…after TDS deduction for the current year only?

I also want to know the TDS deduction rule (in general) for fixed deposits.

Thanks.