Basis in Traditional IRA Accounts

[MDDM]

I inherited my deceased wife's Traditional IRA accounts in 2019.  How do I report her nondeductible contributions in addition to my nondeductible contributions when my future RMD will include the inherited IRAs. TurboTax  currently retains both bases individually.

[macuser_22]

Inherited IRA's must be kept totally separate from your own IRA.  The basis on a 8606 for must be in the deceased's name.  TurboTax does not support a separate 8606 for an inherited IRA. That can only be prepared manually on paper and attached to a mailed tax return.

However, when inherited from a spouse, you can choose to treat it as your own IRA and add the basis to your own basis.    Your financial institution can make a trustee-to-trustee transfer of the IRA inherited form your spouse into your own IRA.

[MDDM]

Thanks for the help in understanding the technical tax treatment and reporting requirement  for my situation.