An RMD is not compensation.
You said, " IRA Simple." Do you mean a SIMPLE-IRA contribution from net earnings from self employment? Contributions to a self-employed retirement plan are not age-limited.
If there is compensation (generally income reported in box 1 of a W-2 minus any amount in box 11 or net profit from self-employment) and the contribution was a regular traditional IRA contribution, not a self-employed retirement contribution, a regular traditional IRA contribution can be recharacterized to be a Roth IRA contribution instead. Otherwise, it will be necessary to obtain a return of contribution before the due date of the 2019 tax return, including extensions.
