How To Fix MN456 - G/L account & in company code & does not allow posting w/o tax code

MN456 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 456

• Message text: G/L account & in company code & does not allow posting w/o tax code

What causes this issue?

It must always be possible to make postings without using a
<GL:tax_code>tax code</> for <GL:G/L_account>G/L accounts</> to which
rebate income or provisions for accrued rebate income from
<DS:GLOS.3526C095AFAB52B9E10000009B38F974>subsequent settlement</> are
posted (postings of provisions for accrued income are not subject to
tax).
Therefore, the indicator "Posting without tax allowed" must be set for
G/L account &V1& in <GL:company_code>company code</> &V2&.
However, this is not the case.

System Response

Settlement accounting is not possible.

How to fix this error?

Please set the indicator or change the account determination (other G/L
account).

Error message extract from SAP system. Copyright SAP SE.

MN456 - Details

• The SAP error message MN456 indicates that a General Ledger (G/L) account in a specific company code does not allow postings without a tax code. This typically occurs when you attempt to post a transaction that requires a tax code, but the system is configured to enforce tax code requirements for that particular G/L account.
  
  Cause:
  
  G/L Account Configuration: The G/L account in question is set up in such a way that it mandates a tax code for postings. This is often the case for accounts that are related to sales, purchases, or any transactions that are subject to taxation.
  Company Code Settings: The company code settings may also enforce tax code requirements for certain types of transactions.
  Transaction Type: The type of transaction you are trying to post may inherently require a tax code (e.g., sales invoices, purchase invoices).
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check G/L Account Settings:
  
  Go to the