If me and my husband live in Michigan and want a divorce and I want to move back to Ohio and also want custody of our kid ,do I move to ohio then file

You must live in Michigan for 180 days before filing here. I don't know the Ohio rules, but they may be similar. You should find out. The easy thing would be to file here, but, if you do that, the Michigan courts will still control your custody situation as long as your ex lives here, even if you move to Ohio with the Court's blessing. If you are in no hurry, and your spouse will not object to you and thekids moving to Ohio, you may find it safer to move first, then wait however long it is necessary to wait before filing in Ohio. Good luck.