A remote seller must determine if you are an in-state or out-of-state seller before registering for sales tax. When you register for sales tax in all the states where you have nexus (physical or economic), you need to make...
If you are an e-commerce seller without an ITIN (an equivalent of an SSN), you may want to consider applying for one very soon. Here is a link to read more about the ITIN.
Yes, we realize it is not required...