How to amend a tax return for a deceased taxpayer?

[9corners]

I would like to amend father's tax return to enter a change in cost basis and depreciation for a rental residence when his spouse died 2 years ago 2017 in California.

Father recently passed away 2019.

I would like to amend for him for 2017 and 2018.

I understand how to amend for change in cost basis and depreciation for 2017 and then carry through for 2018.

However, who should sign the amended returns?

There should be a refund, and I am wondering how to get this refund into his estate?

[soultax09]

condolences. executor or administrator signs the amended returns....if none then anyone in charge of deceased's property. file 1310 and the refund check should be made out to person filing the form.

[9corners]

Thanks!