That comment above was addressed to one of those helpers familiar with Ohio that I've asked to assist you in correcting it today. But I don't know when they will be back in the forum, but possibly later today.
To open your state return back up, log in at the Tax Home and look for a link "add a state" (you don't really add one; that's just to get back to your return.)
Or if you don't see that, go to "Your Tax Returns & Documents". Expand that section and choose 2018.
Then choose "Add a State." (that opens the return back up)
I did find this old post by SuperUser ee-ea on this topic:
<a rel="nofollow" target="_blank" href="
https://ttlc.intuit.com/questions/4454528-how-do-i-fix-the-error-code-ohcom-012-for-the-state-taxes"...>
Read that answer at the link, and if you have further questions, one of the people I asked to assist you should comment in this thread.
