Hm. The most interesting thing from this is that if your total lines don't equal your Totals tab, the Recalc Sales Tax utility will put them back into sync. Helpful for people with few open orders but each order is huge. Not so helpful with lots of orders and using Avatax. I tried running this for another reason with a client and found that SOMEONE in their infinite wisdom has it display errors that you have to click on as it processes. Doesn't print an error log like other utilities, and the errors don't even bother to tell you which SO is the issue.