To set up direct deposit, you will need your receiving firm's (your bank most likely) ABA Number. An ABA number (sometimes called a 'Routing' or 'Routing Transit' number) will identify your bank uniquely within the direct deposit system. If you think of a phone number as the number that lets you call somebody, an ABA number is a number that lets you send somebody money via direct deposit. Just call your bank and ask what their ABA number is -- they will know what you are talking about.