Whether or not you are subject to annual beneficiary RMDs under the 10-year rule depends on the age of the original owner, not your age. You age is just used to determine the amount of an RMD that might be required under the 10-year rule.
I assume that you are not the spouse of the decedent. If that assumption is correct and you are not subject to RMDs under the 10-year rule, you can simply indicate any amount up to the gross-distribution amount (box 1 of the Form 1099-R) as the RMD amount. Doing so will prevent TurboTax from generating Form 5329 Part IX.
