The IRS website is built on a really old mainframe and apparently can’t read lowercase letters. So instead of “123 Main Street, Anywhere, USA” try “123 MAIN STREET, ANYWHERE, USA”

— Jessica Roy 🦅 (@jessica_roy) April 25, 2020

This is true. I have been trying to give the IRS my bank account infor for a couple weeks and every time I tried I got a “account unavailable” message. I just tried with all CAPS and it worked. Hopefully I get my stimulus check soon direct deposited.