It says right on the page "When you set your home state, all of the search pages in the RadioReference database will default to this state." so there is no county to enter. If you want to add individual counties to your My RR page you have to go to them via the database links/map and once in the county click the link to add to My RR. It also tells you this right on the My RR page where you entered your Country and State. "To add a county to your watch list list, navigate to the county page in the RadioReference Database, click the top right menu icon and choose "Watch changes.""