If you've encountered this error, we can help. There's a check in place for documents sent from billing to the accounting interface and for documents sent to the accounting interface via the journal entry APIs. When these documents are sent, the system checks whether the general ledger account to which they should be posted is tax-relevant or not. If the account is tax-relevant, the system checks to see whether a tax code is in the document. If there's no tax code, the system raises this error message, letting you know that the account requires a valid tax code.
If you see this message and are using either of the journal entry APIs, you can find the information about resolving the error in SAP Note 2927662. If you see the message when you're sending billing documents, you'll need to verify that the documents have the correct tax information and resend them. You can also use the Manage G/L Account Master Data app to see the tax category assigned to the G/L account, which can help you verify that the tax code on the billing document matches the tax conditions of the G/L account.
