There are two different tax aspects. One is the 20% tax on the capital gains that arises, which you say is NIL since you are either investing in another property, or there is a long term capital loss.
Secondly, is the 1% tax deducted at source by the buyer at the time of making payment to a resident seller, if the value of the property is more than 50 lakhs. In your case, the sale price is less than 50 lakhs, and you are a non-resident. Hence, this is not applicable to you.
Unfortunately, since you are a non-resident, it is compulsory for you to obtain a no-objection certificate from the assessing officer.
If you are an NRI, then it is advisable to convert your bank account.
M.Com., CA, LL.B