My son received a 1099Q for a $7K distribution from his 529 plan, which went directly to his Roth IRA. How do I enter this in Turbo Tax so it is not taxed?

I have entered the 1099Q, but TurboTax is including the earnings portion of the distribution as taxable. Not sure how to indicate in Turbo Tax that this distribution went directly to his Roth IRA.