I disagree with Carl's viewpoint of when it was converted to personal use.
That's fine. But if audited, it's not me you have to prove it to. When dealing with the IRS there are three golden rules.
1) You are guilty until proven innocent.
2) The burden of proof is on the accused (that would be the tax filer) and not the accuser.
3) If it's not it writing, then it did not occur.
