Under no circumstances what-so-ever does the child support received by you matter, or get reported anywhere. Ever.
From your grant, you can only claim "qualified" education expenses, which are tution, lab fees and books. I have no doubt that **IF** any portion of your grant is taxable, it will not bring your taxable income anywhere close to $6,350. But since you had taxes withheld from your paycheck, file the return anyway to get those withheld taxes refunded. It's also possible that you may be able to get the EIC for your child, and I would be surprised if you did not.
However, I do have one really IMPORTANT question. How did you support yourself and a child with $600 of income for the year and a $5K grant? Even with child support, I can't see any way possible. Heck, the child support alone wouldn't even cover a mortgage or rent payment.
I'm asking, because it "sounds" to me like you qualify to be claimed as a dependent on someone else's return. If so, that changes a lot of things for you.
