We have two tax rates we charge: 6.11% on some items and 9.11% that we have to charge on other items. I was testing our setup and noticed that orders were having an extra $0.15 added to them. Looking at the taxes, they were consistently $0.15 higher than what our POS or a calculator shows they should be. I turned off the Tax Classes extension and the total was correct (except no tax). It appears that it is adding both tax rates to every order for a single dollar, then working correctly after that.
Edit, after further testing, it looks like it’s charging both tax rates on the delivery fee, even if it’s a pickup. Our delivery fees should not be taxed and it should not charge the tax on the fee if the fee is not applied.
Edit two, I enabled “tax on delivery” for both taxes, saved, then disabled it again for both and saved and that seems to have fixed it for me. However, it still should not have been applying the tax to pick-up orders.