Tax Rex ‑ Sales Tax Automation

I've been using Tax Rex I believe for 2 or 3 years now. I was skeptical at first b/c of such bad experiences in the past with several other services. So I started out only having them manage one or two states in the beginning, but now they manage the majority of states I do work in and I plan to add more when I expand into other states.

I highly recommend Tax Rex they also do a good job of communicating via email and are prompt to respond.