You need to provide this information in your TaxCloud account. Log in to TaxCloud, go to the Locations tab, and enter the addresses for your physical locations. TaxCloud will then calculate sales tax for these states. These states are considered your "nexus" states and will appear in orange on the Tax States map.
If the only states where you collect sales tax are states where you have a physical location, that’s all you have to do. If you need to collect sales tax in any other state, go to the Tax States map and click on the state to turn it blue. Any orange or blue state on the map is a state where you are collecting sales tax.