Where do I put that we received $1000 in financial aid for my college son's tuition.

It depends on whether "financial aid" is scholarship or loan.  Loan are not reported. The school usually shows the scholarships received in box 5 of the 1098-T.  If you received additional scholarship, not included in box 5, the TurboTax educational expenses interview will give you a chance to enter that after you enter the 10980T. 

What type of financial aide?  If your son received a grant or scholarship it should be in box 5. If you received other types of financial aide, as you walk through the steps after you enter the 1098-T, you will be asked if you received any employer assistance, scholarships or grants.  You can select yes and enter it there.