Do you have the correct taxable amount on 2021 Line 4b and did not take a deduction?
After you e-File,
get Form 1040-X from IRS website and mail it in with your 8606, which you can also get in fillable PDF.
Note: since you are not changing any dollar amounts on your amended tax return, you can leave all the 1040-X lines 1-23 EMPTY.
In Part III, you can explain your recharacterization. Include dates and amounts.
@gmcadams
