Tax Collection at Source on electronic commerce requires operators to collect tax on net taxable supplies if they collect consideration. E commerce operators must collect Tax Collection at Source on the net value of taxable supplies made through their platforms where they collect consideration, with collection based on time of supply and net of returns. Operators have compulsory registration obligations and must file prescribed monthly and annual statements; TCS collected is remitted within ten days and credited to suppliers' electronic cash ledgers for use or refund under existing provisions. Exclusions include exempt supplies, reverse charge supplies, composition supplies and imports; interest and penalties apply for omissions.