If you are receiving those $$, and you are age 73 or older...then the box 1 value on the 1099-R is the RMD.
Pensions automatically distribute the RMD...and whatever they send is the RMD.
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It's only for things like IRA, 401k, TSP accounts where you have to initiate the withdrawal. Those accounts are where you have to be careful to take the RMD....or more.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*