The field should be equal to 0 and 'CGST/SGST Amount' must be empty.

The field should be equal to 0 and 'CGST/SGST Amount' must be empty.

This error will receive when you have entered amount in CGST/SGST where the transaction is between two other state.

For that you need to check below scenario:

If the transaction is intra-state then CGST and SGST should applicable and IGST should be blank.

If that transaction is inter-state then IGST value is applicable and CGST/ SGST will be blank.