You cannot post the document (Account & has wrong tax category)

What causes this issue?

The General Ledger &V1&, to which posting is to take place, has been
allocated to the tax category '+' for output tax.
Therefore, you cannot post to this account using this transaction.

System Response

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

How to fix this error?

Check the tax category for the account and account allocation for the
depreciation areas to be posted to online.

Error message extract from SAP system. Copyright SAP SE.