After you file

When filling out my taxes, I entered my 1098-t, but the amount I paid to the school was more than what is represented in box 1, which is also less than what is listed in box 5. Where do I enter the extra expenses paid toward tuition and school fees, or does that not matter? Also, if my Pell Grant was used as taxable income but it is listed in box 5 on 1098-t, do I need to do anything? TIA