Business & farm

I get a 1099r from my former spouses military retirement pay. I don’t know how to answer who gave me the 1099r or what kind of retirement plan is it is is qualified or non and how much was RMD? I’m 72 first time doing this and I can’t get this part snd it’s making me crazy’s. They deducted taxes on the 1099r already. I’ve been getting this pension for over 20 yrs now can you help