Alright, and what are those credits based on?
Credits are based on your total wages and self-employment income for the year. You might work all year to earn four credits, or you might earn enough for all four in much less time.
Okay. Is it possible to do it in person or over the phone if I can't do it online?
Yes, you can call and apply by phone.   You can call at 1 - 800 - 772 - 1213 ,  or TTY 1 - 800 - 325 - 0778 from 7 AM to 7 PM Monday through Friday