Understanding GUI/VAT Number Prefixes for Input Tax

Input tax is the tax that you pay on your purchases. When you process vouchers or journal entries for your purchases, the system must validate that the GUI/VAT prefix that your supplier used for the transaction is a valid prefix for the transaction date and format.

You use the GUI/VAT Prefix Setup program (P75T006) to set up associations between GUI/VAT prefixes and the format codes that you use for purchase transactions. You set up the associations for each year and month for which you process transactions (Happen Year). The Taiwanese government publishes the set of GUI/VAT prefixes annually.

The system uses the associations that you set up to validate that the GUI/VAT prefix is valid for the format type and transaction date of the transaction. If the association is not valid, the system does not enable you to proceed with the transaction. The system performs the validation when you use these programs:

• Standard Voucher Entry (P0411)

• Speed Voucher Entry (P0411SV)

• Journal Entry (P0911)

• Journal Entries with VAT (P09106)

The system saves the data for the associations to the GUI/VAT Prefix Setup table (F75T006).