@ThereseLogeais Am importing invoices from another system, and sales tax is being calc'd there... so need to import the tax regardless of what MAS 90 figures it to be. @NancyHanson I can try writing it back with a script, but if the field is read-only, not sure if it'll make any difference. When you say ""Can't import tax in 4.50"", is that a statement from Sage or has that been your experience?