SAP Message CA_TTE637 - Maintain tax code &1 in access sequence &2

Diagnosis
In the header data, the user has indicated that tax calculation isrequired from a tax code. In Tax Code Values, a tax code &V2& that hasnot been maintained as a key field for the access sequence &V3& hasbeen entered.
However, as the input document is complete, the system uses the nextsuitable access sequence to determine the tax rate.

System Response
The tax code is not used for tax determination.

Procedure
In Customizing for TTE
Choose Maintain Tax Rates and Exemptions
.
Maintain the tax code &V2& in the tax code access sequence &V3& .
Choose Save.
To update Customizing settings, choose ImmediateCustomizing Refresh.

Procedure for System Administration
In the output document, check the tax procedure log on item level.