Nothing about a Form 1099-R for a distribution from a distribution from an inherited IRA prevents the tax return from being filed now. All of the related forms have been already been approved for filing. However, even if something related was still not yet approved for filing, TurboTax would still be doing the calculation correctly because nothing has changed from 2022 with regard to calculating the taxable amount of this distribution.
Examination of the forms, schedules and worksheets in your tax return will explain how your tax liability is being determined and will identify the reason for the disagreement between that and your expectations.
