For tax code &, use G/L account &

What causes this issue?

You have transferred a tax item with the tax on sales/purchases code
&V1& (field TAX_CODE) to parameter ACCOUNTTAX. In Customizing you have
defined that G/L account &V2& should be used with this tax code.

System Response

The document cannot be updated.

How to fix this error?

For tax on sales/purchases code &V1&, use G/L account &V2& in field
GL_ACCOUNT, or leave the field blank.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.