A myRA is nothing more than a Roth IRA with a limited investment choice. Like any Roth IRA, you can take a distribution of your original contributions tax and penalty free. Since the distribution was a nonqualified distribution the distribution must be reported on From 8606 to determine the taxable amount of the distribution.
In TurboTax, enter the Form 1099-R exactly as received under Wages & Income -> Retirement Plans and Social Security -> IRA, 401(k), Pension Plan Withdrawals (1099-R) and answer the immediate follow-up question. After entering all of your Forms 1099-R, click the Continue button on the Your 1099-R Entries and, when TurboTax asks, enter the net amount of you Roth IRA (including myRA) contributions and, if any, Roth conversions. TurboTax will automatically prepare Form 8606 Part III to calculate the taxable amount of the distribution
