Special Cases: Posting Value-Added Tax 
Use
Postings from payroll accounting - usually postings in the form of Expenses to Payables - are not usually subject to value-added tax. Neither the expenses, nor the payables contain input or output tax. When posting payroll results, accounts to which amounts subject to value-added tax are posted as a result of other transactions are not affected.
In a special case, however, you can use Posting to Accounting to create posting runs with restrictions subject to value-added tax
Special Case of Travel Expenses
When travel expenses are posted and the reimbursement takes place via payroll accounting, the following operations are performed separately:
If travel expenses have been determined by travel cost accounting and they are to be posted in payroll accounting, and not in travel cost accounting, the wage type is coded appropriately. However, no personnel number and no travel number can be entered in Posting to Accounting. For more information, see the R/3 Library under Travel Management.
Special Case when Issuing Invoices to Employees
When posting transactions representing invoices to employees, the following transactions are usually carried out in accordance with the declaration principle:

If you want to simplify these transactions by grouping them into one transaction and posting them as Personnel expenses to income/expense reduction in Posting to Accounting instead, then proceed in the following way:. You can do this by assigning an account to the corresponding wage types in Financial Accounting. This account is linked to a fixed value-added tax. The value-added tax can then be taken into account directly during the posting run.

If the Posting Without Tax Permitted field is flagged, amounts are posted from Payroll Accounting without value-added tax to accounts assigned to the following tax categories in the master record:
Tax category |
Meaning |
* |
All tax types allowed |
+ |
Only output tax allowed |
– |
Only input tax allowed |
Special Case when Reimbursing Paid Amounts
When reimbursing amounts paid by the employee, the following transactions are usually carried out in accordance with the declaration principle:

Reimbursement of travel expenses or other expenses outside of the SAP Travel Cost Accounting component.
If you want to simplify these transactions by grouping them into one transaction and posting them as Personnel expenses to income/expense reduction in Posting to Accounting instead, then proceed in the following way:. You can do this by assigning an account to the corresponding wage types in Financial Accounting. This account is linked to a fixed value-added tax. The value-added tax can then be taken into account directly during the posting run.

If the Posting Without Tax Permitted field is flagged, amounts are posted from Payroll Accounting without value-added tax to accounts assigned to the following tax categories in the master record:
Tax category |
Meaning |
* |
All tax types allowed |
+ |
Only output tax allowed |
– |
Only input tax allowed |
Restrictions
If you set up the special cases described above in your R/3 System, the following restrictions apply.