One of my client is selling Maize to Poultries. His total turnover for the AY 18-19 is Rs. 4596800. Last year we used presumptive scheme. For this year if I use 44AD Presumtive scheme to show TO Rs. 4596800 and Income Rs. 3,67,744. ITR4 is filled and it asks for GSTIN number. As maize is exempt from GST he didnt register GST. How to file his return? Please help.