All Questions › Category: GST Compliances › RCM for GTA 0 Vote Up Vote Down Arabinda roy asked 7 years ago RCM for GTA IN 3B RETURN WHERE I DROPDOWN GTA RCM AMOUNT! Answer the question 1 Answers 0 Vote Up Vote Down DHANANJAY KUMAR SONI answered 7 years ago Open the return dashboard and then open 3b return.in 3b return open 3.1 tax on outward and reverse charge inward supplies after open this window u see columns (a) to (e) you fill the GTA RCM amounts in column (d).