Are the gains in your 529A taxable when you withdraw them to pay tuition?

[carubri24]

I entered my 1099Q Last, and it cut my refund in half.

[SusanY1]

TurboTax will show this as taxable until you associate them with expenses in the education expense section of the program, which is a little later in the interview.  

To enter your education expenses, visit Deductions & Credits then click on  Expenses and Scholarships and follow the prompts.  Once your qualifying education expenses are entered, you should notice that the distribution is no longer treated as taxable.