We receive a 'The field VAT % contains an invalid value' error when a VAT % amount is recorded as being >100% and we cannot progress the invoice any further. This error is valid when VAT Type is 'Exclusive', because it indicates that the VAT Amount > Total Amount. But it shouldn't be invalid when the VAT type is Line Exclusive or Inclusive, because it merely indicates that the VAT Amount > the amount of the other invoice lines.

We encounter the problem when paying invoices where the invoice primarily consists of a taxed amount. This is common when receiving invoices from customs where we need to pay the tax on an item that we have already paid for on a separate invoice to a different supplier.

We have a workaround, similar to the solution that Ex Libris has offered, which is to use a field other than VAT Amount to record the VAT in these cases. However, Alma integrates with our Finance system and it's not easy to write these exceptions into the integration, and it's confusing for staff keying the invoice. We could instead continue to use the VAT Amount field to record all tax amounts if one of the following solutions were implemented:
1) display this error message only when VAT Type is ‘Exclusive’ and VAT amount >100%, because it shouldn't be invalid when the VAT type is Line Exclusive or Inclusive, or
2) give us the option to disable this error message entirely so that it shows as an Alert only, which we can ignore.