I get paid in btc and I mark incoming transactions as income, and when I have a business expense I use the spend option.  For any transfers between wallets I debit one wallet and credit the other as a deposit and withdrawal.  Whenever I sell some of my bitcoin for good I mark it as a withdrawal on its own.

The problem is that my taxes are extremely off, it shows me as never having a loss on any coin sale even though I have had alot.  Am I denoting one of them incorrectly?