You can enter the 1099-Q by navigating to Federal > Deductions & Credits > Deduction & Credits Summary > Education > ESA and 529 Distributions (Form 1099-Q).
Note that the IRS does not require that you report the 1099-Q in your tax return, if the entire distribution was used for qualified expenses. "Beneficiaries are not required to report distributions on their tax return as long as the distribut... So, if you used the distribution for qualified expenses, and your state follows the federal rule, you can omit entering the 1099-Q.