You can. But do not under any circumstances elect to import anything from the 2017 return. If you do import, then all I can tell you is, you were warned. Also note that if you were the 2nd tax filer listed on the 2017 return in that account, and you're now going to use that same account to file as single, then you can expect major issues with e-filing from that account. Chances are high you won't be able to e-file too, then.
