You can use posting area S001 not only for revenue account determination, but also for the derivation of the tax determination code.
You can use the tax determination table TE011 to determine the valid tax code for general ledger accounting historically and country-specific based on the tax determination code.
You can use posting area 0010 to specify the tax accounts to be posted depending on company code, tax code and tax transaction.
See Screenshot File Steuerermittlung04.
In FI-CA, an enhanced account assignment of postings to accounts for tax on sales and purchases is available. This also includes the option of splitting tax amounts and tax base amounts across different account assignments.
The enhanced account assignment option applies to the following fields: business area, segment, profit center, commitment item, funds center, fund, functional area, funded program, and grant.
If you want to use the enhanced account assignment for tax items, you have to activate this option in customizing for each company code. If the new function is active, the system determines, for each tax item, all other related G/L items that have the same tax code. These items can contain various combinations of the account assignments listed in the previous paragraph. The system determines the total amount for each combination. The tax item is then mathematically split into subitems, and the relevant account assignment combination is assigned to each subitem.
The subitems are relevant for updating totals records for the reconciliation key and, therefore, also for updating the general ledger.
In the FI-CA document display, the tax items are initially displayed as usual. If the account assignment is unique, the tax item is displayed in the same way as for other general ledger items. If there are differing account assignments, you can display the split using the Account Assignment button.