This guide is SOP to correct tax calculation variance in supplier invoice (Created from GRN)
1) Navigate to Extended Modules > Malaysia GST > Tax Filing > GST Adjustment to perform GST adjustment.
In Step 5), it is advisable to create a specific GL code for rounding supplier invoice variance, post it under GL category as COGS-purchase adjustment/discount.
2) Navigate to Supplier > Credit Memo > Create to create supplier credit memo.
