My bank has changed hands and we have our Social Security directly deposited in the bank. Bank Iowa has now bought the First State Bank of Colfax and we need to have the bank number changed on our deposit.

Make sure you dont wear a Trump hat. I did and was treated very badly. Next visit i left hat in my car and got nice service

Just go down to your local SSA office, with proper ID. You'll probably also have a new routing number, every bank has its own, along with your new account number. Or you can try online, it's not bad, even I can do it. There's always the third option, call them, but the wait times could kill you.