Retirement tax questions

hmm....I have already contributed in an account that already had a non-zero balance.....is that a problem? 

 

Or I am good as long as I don't convert it to a Roth before I zero out the balance? Not sure I understood it though since Form 8606 only asks for the balance of your IRAs as of Dec 31st and as long as that is 0 on Dec 31st, I thought I am ok.