Did the estate have an EIN and did you sell the house on behalf of the estate? In other words, did the estate, itself, sell the house and then distribute the proceeds to the beneficiaries (siblings)?
You should receive some sort of tax reporting statement and if that statement (most likely a 1099-S) has the name of the estate as the seller (transferor) and the estate's taxpayer ID number, then the estate will most likely be required to file a Form 1041.
See https://www.irs.gov/instructions/i1041#idm140229151947712
You should seek guidance from a tax professional in your local area.
