I took a 529 plan distribution to pay for private school tuition. TTax says earnings are taxable. How do I correct this?

[Ashby]

You can just not report the 1099-Q, at all, if your student-beneficiary has sufficient educational expenses (up to $10,000 for K-12) to cover the distribution.   When the box 1 amount on form 1099-Q is fully covered by expenses, TurboTax will enter nothing about the 1099-Q on the actual tax forms. 

Save the 1099-Q and the Tuition statement with your tax file. There is nothing more you need to do.