Form 4127 is estimated to be available in TurboTax on 2/3//22. See this link for forms availability:
https://care-cdn.prodsupportsite.a.intuit.com/forms-availability/turbotax_fed_online_individual.html
After the IRS releases a form, all tax software providers must program it into their software and get the IRS approval that it is programmed correctly before the provider can put it in their software. That is why availability in the software is often delayed.
