Inheritance

My father-in-law died in 2020.  In 2021 we received a final cash inheritance which came from his IRA.  This was divided up 4 ways each equating to $50,000.  My brother-in-law is the executor of the estate and was told we do not need to claim this anywhere on taxes.  We already filed our 2021 and now we received a 1041 Schedule K-1 form from him.  Are we supposed to claim this amount of inheritance??  Are taxes owed??  Very confused.  Any suggestions would be helpful.  I live in Michigan