After submitting GSTR3B I have got this email from GSTN:
Dear Sir/Madam,
This is with reference to the recent processing of export invoices for GSTIN XYZ. Please be informed that the invoices have failed validation at GST System, and haven't got transmitted to ICEGATE for further processing.
The GST System uses ledger based approach to validate if sum total of IGST/CESS paid under Table 3.1(b) of GSTR 3B across all periods is equal to, or greater than, the sum total of IGST/CESS from invoices under Tables 6A/9A/6B of GSTR 1 across all periods. The eligible invoices, having complete SB/Port details, are transmitted by the GST System only if such cumulative validation of IGST/CESS is successful.
The GST System does not transmit an eligible invoice to ICEGATE until the aforesaid validation is successful, i.e. the sum paid as IGST/CESS paid under Table 3.1(b) is greater than or equal to IGST/CESS from invoices under Tables 6A/9A/6B. The ledger shows the difference between these two which should be ZERO or positive) for invoices to be transmitted to ICEGATE.
For GSTIN XYZ, the present IGST difference is Rs.-176619 and the CESS difference is Rs.0.0. You may use table 3.1(b) of subsequent GSTR-3B to fulfil this difference and the GST System shall transmit invoices upon successful validation.
Please feel free to contact GST Taxpayer Helpdesk for any further questions.
Thanks & Regards
Team GSTN
-----
Does anyone else know how to resolve this? Is this a new tax liability because of a mismatch?