“My daughter and I received our green card May 2015, should we renew our green card this coming May? Or can I apply for citizenship instead of renewing the green card?”
A regular green card is good for 10 years but a conditional green card (which means you have been married to a U.S. citizen or green card holder for less than two years) needs to have the conditions lifted after two years and then it becomes a permanent green card.
You will therefore have to renew your green card and lift that conditional status. If you don’t, the green card will expire and you will have to leave the United States and apply for a new one. Importantly, you must apply to renew your conditional green card in the 90 days before that expires. Check your green card’s expiration date and subtract 90 days. That will be the date on which you must file to renew it.
After you apply and the conditions are lifted, you will receive a 10-year green card and after a year you are eligible (if you are still married to your U.S. citizen spouse) to apply for U.S. naturalization.