If you took a distribution from your Coverdell ESA, you should have received a form 1099-Q with the earnings portion of the distribution in box 2 and the basis in box 3.
Some ESA custodians may leave boxes 2 & 3 blank and you have to enter from your own records. TurboTax can do that. But, you have to know the starting info ("Basis in this Coverdell ESA Account as of December 31, 2018"). You get that from your own records. Your year end 2019 statement, from the fund, may have it.
