You only show the RMD that you actually withdrew in 2018, If you withdrew it on 12/31 but did not receive it until early Jan. then it is considered paid in 2018. However if you did not withdraw it until 2019, then it would go on your 2019 taxes. and you will still need to take your full RMD for 2019. However, if this is the case then you would be liable for a penalty for not having taken the full amount of your RMD in 2018, unless you can show good reason for not have taken the full amount in 2018. Turbotax can help you with this.