Tax Date
This field contains the tax date that will be shown on VAT
transactions. By default, this is the same as the invoice date. If certain country packs are
enabled, this date can be changed as needed. See the country guides for more information about
tax dates.
If the tax date is updated, the exchange rate is also changed to the rate in effect on that date. If the tax date is updated after the voucher is saved or generated and if the exchange rate is different from the rate on the PO receipt date, an automatic journal entry (Purchase Price Variance, or PIV) is created to account for the difference.