My parents became US Citizens when I was 17 yrs old. There was a form that they needed to fill out but it was not available @that time. I am know 28 what do I need to do.

Lillian, I believe you think that you are able to apply for US citizenship because of you age when you parents become US citizens. Correct? If you have a green card now or does not have any status in the US, should apply for US citizenship. I think the process is called naturalization. There should be no problem for you to become a US citizen if you parents are US citizens. I think it is form N-400 you need. Good Luck!