Transport business

This query is : Open

RAMAKRISHNA (Querist)
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27 September 2020 my friend has transport agency , he registered in gst , he has no own vehicles but he is hiring vehicles for transportation and getting commission on each trip , He is raising transport bill on total amount to customer on rcm basis , he is filling gstr-1 and gstr -3b , he has done approx 50 lakhs worth bills raised in fy 19-20 As per gst turn over is 50 Lakhs but he has got commission on each trip minimum 200/- . How can he show the turn over in income tax , as per gst turnover 50 lakhs but he has arrived income nearly 2 lakhs( commission) on total year because he has hired the vehicles from others.
Please give your valuable suggestion on , how can he show the income as per gst turnover or commission basis , customers transferred the total bill amount in his bank account sir .