To correct the sentence, you can say, "Jamal has gone to visit his uncle in Jacksonville, Illinois." The corrected sentence maintains proper subject-verb agreement by using "has gone" instead of "has done gone." Additionally, the correction includes capitalization of "Jacksonville" as it is a proper noun, and a comma after "Jacksonville" to separate the city from the state.
Related Q&A：
How do you fix the sentence jamal has done gone to visit his uncle in jacksonville Illinois？-Well, that sentence is a bit of a mess, y'know? To fix it, we should say \Jamal has gone to visit his uncle in Jacksonville, Illinois.\ The phrase \has done gone\ isn't correct. It's more proper to just use \has gone\ That way, the sentence makes a lot more sense and sounds a whole lot better, don't you think?
