Tax classification for material & in country & not maintained

What causes this issue?

For the system to determine taxes to be paid, the tax classification of
the material must be maintained for the country in which the plant via
which the material was sold is situated.

System Response

The sales volume for this material could not be updated.

How to fix this error?

Using <DS:TRAN.MM02>material maintenance</>, maintain the tax
calassification of material &V1& for the country &V2& in which the
plant is situated.

Error message extract from SAP system. Copyright SAP SE.