Taxable and how much amount

I have invested Rs.20,00,000/- in Aviva pension elite fund managed by Aviva life insurance for 5 years and received back Rs.28,94,992/- in December 2016 on which the tax was deducted at source @ 1% U/s 194DA. Kindly advise whether total receipt are taxable or only accretion to the fund is taxable in my hand. please note that no deduction has been claimed u/s 80C in respect of payment made towards Annual premium.