I started my Roth when I was 18, funded it for a few years, took a few years off because I didn't quite understand the rules, figured them out then started contributing again, same for the wife, unfortunetly she could not make full contributions some years due to not having enough earned income. I moved my provider once, she has not. Now I am looking at withdrawing contributions, but not earnings. My records are pretty poor. What is the best way to reconstruct contributions vs earnings?