My brother in law passed away in 2020 and his 401K was distributed to 3 living siblings, there was no will. We received one 1099R for the full amount but the distributions were made by the executor pre tax. We made an estimated tax payment in Q4 2020 so the taxes are paid. I am wondering how to handle the 1099R. Can i only add in 1/3 of the amount into my 1040? Are there special forms i need to complete?
