In case of sale of property by NRI, you will have to deduct 20% plus applicable cess and surcharge TDS on the sale price of the property if capital gain is long term capital gain.
In case of short term capital gain, TDS will be 30% plus applicable cess and surcharge irrespective of income tax slab of NRI.
Further, if the property value is more than 50 lacs, you will have to deduct TDS @1% for the payment made to builder.
Please feel free to call/revert in case you need more clarity.
Thanks and regards
Abhishek Dugar
CA CS B.Com