If amounts in a transaction are in a foreign currency, a VAT Summary section is added in the printed invoice or credit memo that uses the Thailand Tax Invoice and Credit Memo Template, respectively. The VAT Summary contains the total amount excluding tax (Subtotal), tax amount and total amount inclusive of tax (Total Amount) converted into the base currency. If your base currency is set to Thai baht, the VAT Summary displays the amounts in Thai baht. The exchange rate used in converting into base currency is indicated in the section header. The exchange rate is sourced from the Exchange Rate field in the Accounting subtab of the invoice and credit memo transaction.