17 February 2018
Sir, We had provided services in Dec2017 but we had omitted to show this month services in GSTR3B in the month of Dec2017 then how could we rectify this mistake?
17 February 2018
No need changes in invoice dates...!
You ll add the sales details in January. But, any liabilities then pay as per your transactions and Pay with interest...
Also file your GSTR 1 correctly...