Take the 2018 ASAP and be sure to also get the 2019 this year. This will result in both being taxed in 2019. There is a penalty for not taking the RMD, so you should file a 5329 for 2018. You can request a waiver of the penalty. https://www.irs.gov/retirement-plans/retirement-plans-faqs-regarding-required-minimum-distributions#...

The 5329 can be filed all by itself. There is signature area on page 2, so it can be completed and mailed with either payment or waiver request.