My account is in my name and my ex husbands name, how do I remove him from my account?

If he was listed first before you will need to start over with a new account.  You can't delete him.  You should not try to change your account/return around.  It won't work.

Online is only good for 1 return.  But you can use the same email address for 5 accounts.   How to start another return in the Online version      https://ttlc.intuit.com/replies/3288574

I meant to say you need to start a new account and not transfer from last year.  You won't be able to get all his info deleted.