Distributions
Distributions from Roth IRAs are tax-free until you've withdrawn all your regular contributions. After that you'll withdraw your conversion contributions, if any. When you've withdrawn all your contributions (regular and conversion), any subsequent withdrawals come from earnings. Withdrawals of earnings are tax-free if you're over age 59½ and at least five years have expired since you established your Roth IRA. Otherwise (with limited exceptions) they're taxable and potentially subject to the early withdrawal penalty.