I inherited a portion of an IRA in 2016. The balance I inherited was rolled over into an Annuity. I paid taxes on this amount in 2016. I now have an annuity with RMD due to my father's age when he passed away. I get the RMD and am taxed on the amount again. When I filed my taxes last year I was told this annuity is not considered an Inherited IRA yet my 1099-R had distribution code 4 (death) listed.

Am I paying double taxes on this? How should I be claiming this on my taxes?