Inherited home left to 3 people. How do I put this on a Schedule D.

Ok. I may have done this wrong last year and might need to file a return. 

 

We inherited a home that was left to 3 people. When the home sold the 3 people split the proceeds. According to what I have been reading everything talks about inherited home to 1 person not three and it is getting confusing. From what I believe I have read we only need to report the difference between the assessed value of the home and the sale price of the home. Any advice on how to report this would be appreciated. I might have to file an amended return for 2020 since the sale was in 2020 and I think I put the information down wrong.

Thanks