Excuse me, after studying in other provinces for three years, I only took the high school exam twice. Can I go back to my domicile to take the college entrance examination?

This is ok, as long as the account has not moved, you can go back to the location of the account to take the college entrance examination. If there are obvious signs of migration, you are in trouble. So your main problem now is to go back to your hometown and find a high school that accepts you to repeat your studies. It may take more time to adapt to the teaching materials and teaching methods, and then repeat one year.