You will have to make fixed deposit which is basically a tax saving FD. the maturity term shall b 5 year for that FD. The amount of FD that you make, you can claim as deduction to save your tax.
There are some fixed deposits with banks or post offices which give tax benefits as interest is exempted under section 80c. They have some fixed time of maturity (let's say 5 years). Before that if you withdraw amount then income tax will be charged on interest as no deduction is allowed.