As shown in the image above, it is possible to create:
- "Sales" related tax register types which will therefore include sales related "Tax Rates" in the "Lines" tab
- as well "Purchase" related tax register types which will therfore include purchase related "Tax Rates" in the "Lines" tab
Besides, every tax register type needs to be linked to a G/L Item.
The ledger accounts defined for that G/L Item will be the ones to use while posting the tax payment calculated as the difference between the "Sales" tax register type and the "Purchase" tax register type.