Typical errors of the GST filing are the matching of GSTR-1 and GSTR-3B, the claim of ineligible ITC and application of the wrong HSN. The non-filing of NIL returns or wrong computations of RCM is likely to attract penalties.
Some common the GST errors are mistaken invoice information, late submission, lack of input tax credit matching, and reporting incorrect tax rates or totals.
There are generally common GST errors such as wrong invoice number, late GST payments, discrepancies in the submitted returns and claiming ineligible input tax credits.
The most common ones are mismatching GSTR-1 with GSTR-3B, claiming ITC you're not eligible for, and using the wrong HSN codes, honestly a lot of it just comes down to not reconciling your records regularly.