sorry for your loss. when he added you two to the title a gift tax return probably should have been filed. assuming your dad added you and your brother to the title without restrictions and his share passed directly to you two then you and your brother each would need to report 50% of the sale on your 2022 returns. assuming FMV was greater than his tax basis on the date of the gift you and your brother each have a tax basis of 1/3 of his basis on the date of the gift + 1/6 of the FMV of the house on the date of his death.
what if no gift tax return was filed or you don't know your dad's basis or you don't know if there were restrictions when he added you to the title - consult with an attorney
I intend to pay off my own mortgage with the proceeds of the sale. just make sure you retain enough in proceeds to pay the income taxes. you and your brother may want to meet with a tax advisor. the advisor can look at your returns and discuss your financial situation to give advice on paying off your mortgage.
