Hello,
I ran into an issue with my integration with v5. In the system, I am integrating with users have the ability to add a flat-rate tax to invoices. These taxes are a set amount and are not based on a percentage amount of the invoice or invoice lines. I don’t see anywhere in the API that it is possible to send an exact tax amount. The only thing I see is to send a tax rate down. Is possible at all to send a tax amount to the API on invoices? I do not want to perform the rate calculation on our own as that can result in rounding errors.
Thank you,
Cameron Williams