The Bkper Tax Bot is triggered upon the transaction posting event when either one of the accounts on the transaction has the property "tax_rate" set. It can also be triggered when one of the accounts is in a group with this property. Taxes are calculated based on the transaction amount and the tax_rate property from the account (or group). With the data off the transaction and the tax_rate, the Tax Bot will record a new transaction with the entry for the taxes.
Learn more about sales taxes and bots on Bkper: