reverse charge under GST

one of my client is a registered dealer under GST act and he is filing the returns as a Kerosene dealer under PDS (by collecting cgst 2.5% and sgst 2.5%). But from recent few months he has started GTA providing services to Indian oil corporation LTD. the IOC people paying GST as reverse charge on his behalf. Now what my client has to do for declaring turnover in GSR1 and 3B. because if I upload gstr1 under reverse charge in BtoB column it may shows liability for me also. and where to enter the outward GTA amount in 3B. can anybody help me in this regard.