Work contract

Sir first if u r providing service u should raise a gst invoice containing all details and it has to be filled in GSTR-1 before 11th of succeding month

And GSTR-3B has to be filled before 20th for that all sale invoice and less purchases made for input calculation to be taken

output-100
Input-75
then Rs.25 has to be paid at the time of filling GSTR-3B

for filling GSTR-1&3b can send details to Selvam970 @ gmail.com-9094573373