After entering the Form 1099-R, click the Continue button on the Your 1099-R Entries page and enter your contributions made for years prior to 2018. Also make sure that you enter as new 2018 Roth IRA contributions any contributions you made to the myRA for 2018.
Also answer the question indicating whether or not your first contribution to an Roth IRA was for some year before 2014. If the contribution to the myRA was your first Roth IRA contribution answer No since myRA accounts were not available prior to 2014.
