If there are any problems with a character you enter you will get a message that tells you there is a problem and what caused it
maybe I should just apply in person or can I call or something?
Yes, you can apply by phone.  Call 1 - 800 - 772 - 1213 or TTY 1 - 800 - 325 - 0778 from 7 AM to 7 PM Monday through Friday .
Will I have any problems if I already have Medicare benefits?