How do I add my 1098 - t (pell grants) as income?

[Hal_Al]

Enter the 1098-T in the educational expenses portion of TT. TurboTax (TT) automatically treats the difference between box 5 and box 1 of the 1098-T as taxable income, unless you enter additional qualified expenses (e.g. books and computers) later. 

If you want more of the box 5 amount to be considered as taxable income, tell TT that some of that scholarship was used to pay for room and board (non qualified expenses).  That question will come up in the scholarship portion of the educational expenses interview.