"The IRS does not care if you take the RMD from each 1099-R account or if you take it all from one of your 1099-R accounts."
Not exactly true. You cannot take the RMD for one
type of account from a different
type of account. You cannot take an employer plan RMD from an IRA or vice versa. For further details see this:
https://www.irahelp.com/slottreport/multiple-retirement-accounts-and-rmds-can-i-take-required-distri...
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
