Facts:

1. Taxpayers grandfather passed away in 2017. 

2. (Inherited IRA) was tied up in probate and not allocated to taxpayer until Mid 2019. 

3. No RMD's were taken in 2018 or 2019.

Question: 

Do we need to submit a 5329 for 2018 and 2019 requesting waiver, and take both RMD's in 2020? or can we put both RMD amounts on one 2019 Form 5329 and explain funds were not allocated until mid 2019?

Thanks for any suggestions as well.