Please see below screenshot .Last year September while filing I have filled sell detail in GSTR1 and filled GSTR3B.But today I noticed there's mismatch between both .while checking i noticed no value is entered in GSTR3B .How to correct this error. Shall I add taxable value in this June month 2023 GSTR3B ? Also please clarify I don't need to add again in this month GSTR1 as I have already entered last year .