For a distribution paid to you within the last 60 days, simply deposit the gross amount of the distribution back into a qualified retirement account like an IRA, perhaps the account from which the RMD was distributed. If you do so, when you prepare your 2020 tax return next year using TurboTax you'll indicate that none of the distribution was an RMD (if 2020 TurboTax asks) and that you rolled over all of the distribution.
Contact your financial institution regarding their procedures for accepting a rollover.
