Until 31st March 2021, if your turnover is:
Upto Rs. 1.50 Crores - Need not print HSN code in your invoice.
From Rs. 1.50 to 5 Crores - Print 2 digits of HSN code in your invoice.
More than Rs. 5 Crores - Print 4 digits of HSN code in your invoice.
Effective from 1st April 2021, if your turnover is:
Upto Rs. 5 Crores - Print 4 digits of HSN code in your invoice.
More than Rs. 5 Crores - Print 6 digits of HSN code in your invoice.