In all the states we operate in, sales tax registrations are open-ended. This means that once you register for a sales tax license, you keep it without having to do any sort of renewal. However, there are penalties for not reporting every month on an active license, so there are pretty strong incentives to report a closed license as soon as one is not using it. In effect, your monthly report is your renewal.
For some reason, Arizona has decided that it needs to put businesses through an annual renewal process for sales** tax licenses. I have no idea why. Even California does not make folks jump through this hoop. Anyway, I chuckled at the name they assigned to this change: "TPT Simplification Program." Because everyone knows that adding an extra paperwork step each year is a simplification. I guess it simplifies the process of keeping their employment numbers up at the Department of Revenue.
** AZ actually call its sales tax a "transaction privilege tax." Since I do not consider voluntary business transactions between two individuals to be a "privilege" that can only be granted by the state, I refuse to use the term.