Material & was assigned various tax codes

What causes this issue?

In entering or processing an invoice, you assigned material &V1& more
than one tax code. This usually does not make sense.

How to fix this error?

Check the original invoice from the supplier.
If in the original invoice the material &V1& is subject to one tax code
only, the material was assigned several tax codes in the system by
mistake.
Check all the invoice items for material &V1& in the system and make any
necessary changes. Also check if a wrong tax code was suggested in the
purchase order. If it was, change the default logik.
If in the original invoice the material &V1& is subject to several tax
codes and this was a mistake on the part of the supplier, return the
invoice to the supplier with the correction.
If in the original invoice the material &V1& is subject to several tax
codes and this is correct, ignore this warning.


&HINTS&
You can switch off this message in Customizing for Invoice Verification.

Error message extract from SAP system. Copyright SAP SE.