I see. I misinterpreted your original question as indicating that you made a contribution for 2021. You can disregard the concerns I mentioned about making deductible contributions in or after the year that you reached age 70½ [I previously said age 72, but I corrected that] unless you make such contributions in the future.
The rest of my original reply applies. QCDs can only come from the pre-tax portion of your funds in the traditional IRA. As such the amount that you indicate as QCD is not reported anywhere on Form 8606 and your basis in nondeductible contributions remains in your traditional IRAs. When you indicate to TurboTax the amount that is QCD, TurboTax will omit the QCD from Form 8606 and will also exclude the QCD amount from the amount on From 1040 line 4b. If all of your distributions went to QCDs, your year-end balance in your traditional IRAs must be at least as much as your basis in traditional IRAs, otherwise some of your basis will have gone to a charity, will not be a QCD and must appear on Form 8606 to reduce your basis going forward.
However, I'm not sure what you mean by these 3 check not appearing on the Form 1099-R. Certainly they won't be separately identified on the Form 1099-R as being QCDs, but the total of these checks must be included by the custodian in the amount that appears in box 1 and box 2a if they resulted in distributions from your IRA in 2021.
If these checks did not post to your IRA before the end of 2021, these would not be 2021 distributions. Presumably they would post to your IRA in 2022 making them 2022 distributions that would appear on your 2022 From 1099-R. With regard to your 2021 MRD, whatever amount is shown on the Form 1099-R goes toward satisfying your 2021 MRD. If that wasn't sufficient to satisfy your 2021 MRD, part of the QCD made in 2022 is could be treated as a late-taken 2021 MRD for which you can request a waiver of the 50% excess-accumulation penalty on 2021 Form 5329. Amounts distributed in 2022 beyond what is applied to the late-taken 2021 MRD would go toward satisfying your 2022 MRD.
