So I've been doing shows in Cali for a few years now. I always had a sellers permit and paid my sales tax. Recently, I got a large bill for my 2018 year for $1600 ($800 + $800 in late fees), claiming I did not do a yearly filing and I owe this. The few artists I've asked have said they only pay sales tax. Seems wrong that I would have to do a yearly filing when I'm not in that state. The filing form is asking all these questions on permit #s that I do not have. Anyone who is in this situation, or similar in another state that has advice is much appreciated! Thanks!