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.

Lilian, 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 citzienship. Ithink the process is called naturalization. There should be no problem for you to become a US citizen if you parents are US citziens. I think it is form N-400 you need. Good Luck!