If one was davening alone and forgot to say Kaparat Pasha in Mussaf on Rosh Chodesh before Adar II, does he have to repeat Mussaf? If so, would it be as a regular tefillah or as a tefillah nedava?
Does this change if the person was at minyan and heard chazaras ha’shatz where the shatz said Kaparat Pasha?
A person that mistakenly left out a few words is yotza as long as they finished the bracha properly. therefore there is no need for you to do anything.