Hello @STP ,
The error indicates that Business Central is trying to post the payment with blank VAT Business Posting Group and VAT Product Posting Group, but there is no corresponding VAT Posting Setup for the blank/blank combination. Check the G/L account being used on the Payment Reconciliation Journal line and verify its VAT Bus. Posting Group, VAT Prod. Posting Group, Gen. Posting Type, and the related VAT Posting Setup. If this is a direct G/L payment, either assign the appropriate VAT posting groups to the G/L account or ensure the required blank/blank VAT Posting Setup exists, depending on your tax requirements. The Payment Reconciliation Journal itself does not determine the VAT setup; the posting configuration of the account being used does.
I hope this answer helps. If you find it helpful, please consider marking it as the verified answer.
Regards,
Mansi Soni