I am currently working on an assignment for my accounting class and I have 2011's completed trial balance and I have to create t accounts for the 2012 transactions so how do I go about that because I am not quite sure how to do it?

Just use the accounts that are on your 2011 trial balance. Your balance sheet accounts will start with your ending 2011 balance, which is your beginning 2012 balance. Your Income Statement accounts will have a zero beginning balance.