If I sign up for AutoFile and there is no tax due for a state, do I still get charged the AutoFile fee?

Yes. Once you register to collect sales taxes in a state, the state will require you to continue filing sales tax returns based on the frequency they've assigned you, whether you made any sales during that period or not.

TaxJar will file these sales tax returns on your behalf until you inform us that you wish to cancel your AutoFile enrollment. Because we do incur costs for filing these returns, the usual AutoFile fee will apply to zero returns.