GST Portal has posted an update that:
A new tax rate of 6% IGST or 3% CGST+ 3% SGST has been introduced on certain goods vide Notification No. 02/2022 dated 31st March 2022. Changes are being made on the GST portal to include this rate in GSTR-1. As a temporary measure, taxpayers who have to report goods at this rate may do so by reporting the entries in the 5% heading and then manually increasing the system computed tax amount to 6%. This can be done by entering the value in the ‘Taxable value’ column next to 5% tax-rate and then increasing the system computed tax-amount to 6% IGST or 3% CGST + 3% SGST in the ‘Amount of Tax’ column under the relevant Table, namely B2B, B2C or Export, as applicable. This will ensure that correct tax amount is reported in GSTR-1. Meanwhile, this rate will be made available on the GST portal shortly.
GSTN regrets any inconvenience caused in this regard.