This is probably not much help, Melissa but I include a sales tax amount in each of my items.
And, then, I manually (yes...on a spreadsheet) figure it out. I do this for any state that requires us to submit sales tax.
If you want an organization that will take care of this for you, check out TaxJar.com. I *think* they are still in business.
I don't have enough sales here on Etsy to pay even their nominal monthly fee.
Best of luck.