Who or what owned the properties when you father passed in 2018? Who or what owned the properties when they were sold in 2020? If it was his estate then you need to file a 1041 for the sales and issue K-1s to the beneficiaries. Was a 1099-S issued for each property? If so what tax ID number was on them? Lastly, if the properties had only personal use you can't deduct any losses.
