reg. TDS

If you are following the accrual basis of accounting in that case you have to pass the provisional entry at the end of the year and in that case TDS deduction will be required.

However if you are following cash basis of accounting in that case deduct TDS when you will make the actual payment.

We are using accrual basis, but tds has not been deducted and return has been filed, is it not possible to deduct tds while making payment in current year?

You can deduct TDS while making the payment. But that will not be according to the provisions of TDS.

There are 2 ways 2 do it. First, deduct TDS on provisional basis and then deposite it with interest @ 1% pm and then revise the TDS return. Second, deduct TDS on payment and deposite TDS with interet (here interest will be 1.5% pm from the date of provision till it was actually deducted and then from the date of deduction to date of deposite rate will be 1%) and consider it in present F.Y.

Option 1 will be better as it will be according to the provisions.