Can an employer dictate where you work remotely?

Yes, an employer can dictate where you work remotely. This is mostly because employees are subject to the laws of the state that they work in. Some states have stricter laws for employees, so employers may discourage their employees from working remotely in those states.

Employers have a say about where you work for security reasons as well. You need to make sure you are working in a secure location for many positions, and while employers cannot state directly where you can and cannot work, you must make sure that you are keeping all information private if you are contracted to do so.