Filing Taxes while Unmarried

Hi everyone!
It's tax time, and as I'm getting my w2 soon, I was hoping to get some advice from couples who are unmarried with children (as my boyfriend and I are) and have filed together.  Its irritating enough to me that we're still not married, but it is what it is, so when it comes to doing our taxes, I want to make sure to have them done right.
Anyone have some examples or insight?