I had a few coins on Binance. Some were in profit and some were in loss. I converted them to USDT and now want to convert that to INR via CoinDCX. Am I liable to pay 30% tax on the entire USDT transferred to CoinDCX or should I consider the Binance acquisition cost while calculating the tax?
You should consider the Binance acquisition cost and be able to support it with your records.
If you are using only binance then you can rely on Binance cost basis otherwise you need to use a tracking software to calculate your cost basis and gains