I have lived in the U.S since I was three months old, my mom became a citizen and started the paperwork for me but never finished it. I am now 22, and have been married to a U.S citizen for a year and a half. How would I apply for citizenship? :confused:

Application for Naturalization (http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=480ccac09aa5d010VgnVCM10000048f3d6a1RCR D)

I have lived in the U.S since i was three months old, my mom became a citizen and started the paperwork for me but never finished it. I am now 22, and have been married to a U.S citizen for a year and a half. How would i apply for citizenship? :confused:

You probably are US citizen already...

Check with your mom first... when did she become naturalized? What was your age at that time?

If you were younger than 16 by the time she became US citizen, you're automatically became US citizen. If this applies to your case, just file form N-600.

Similar case here: https://www.askmehelpdesk.com/immigration-law/if-husbands-parents-became-usa-citizens-when-husband-14-a-245303.html