TDS on withdrawal from NSS a/c

Is post office justified in deducting cess (3% of TDS) along with TDS on withdrawal from NSS account?

I withdraw Rs. 70,000 from my NSS account. As per TDS rules, 20 per cent TDS is required to be deducted. As such post office should deduct Rs. 14,000 as TDS, but the post office deducted Rs. 14,420.

As per my information, education cess and secondary and higher education cess (at 3 per cent of TDS) are applicable for TDS purposes in the case of tax deduction from payment of salary to a resident or a non-resoident and also applicable in the case of payment or credit of any other sum to a non-resident or a foreign company. In no other case, education cess and secondary and higher education cess are applicable for TDS purposes.

What is your opinion?