System Variable 657: Lock VAT Codes in Vouchers For Approval

Use this System Variable to dictate whether the VAT codes on creditor invoices can be changed while in the For Approval status.

Once this setting is enabled, VAT codes cannot be changed manually for vouchers in the For Approval (20) stage.

This System Variable is a part of the VAT grouping.

It may be necessary to perform a refresh when modifying System Variable values.