You will need to enter the distribution from your Roth on Form 1099R, exactly as it appears on the 1099R, as well as the contribution to your Traditional IRA.
TurboTax will ask in the succeeding screens, after you enter the 1099R, what you did with the money, if you withdrew it, contributed it to another account, or did something else with it.
This will record both transactions correctly in TurboTax.