hello,I made sales to sez but I did not mention the same in gstr-3B and it was filed and now while filing GST-1if there is a mismatch between the two what is the consequence.
GSTR-3B is the summary return and GSTR-1 is the final return for Outward supply. if you made mistake then that is your reconcilation items. as per me no consequences for this type of error or mistake.