The problem is that homeschool requirements change from state to state. Most state's require that the student take test's to prove they are being educated. the results of these test for what would be the senior year is what you are looking for. Same paper is required for a home schooler to go to college. You should talk to the local school board. The only thing correct here is that requirements vary by state. Many states do not require tests. No such tests were required for my kids to go to college. And the local school board is the last place I would go with questions about homeschooling, as they are the least likely to be informed.
Your statements remind me of the time I was talking to a lady who had home schooled two kids. I said something about the "TVA" and she looks at me and said what's that?