My brother is the exector of my aunts estate. He has a joint checking account. The aunt died. Before she died she sent in forms to sell 9 different stocks. If my brother calls the IRS for a tax no. and they give him one. Can he start putting in the stock checks in the bank and start use the money to maintain estate until probate appoints him? Or does he have to wait until the court appoints him and they give him a tax # ?