How can I learn my DCN number of my supposedly e-filed 2nd amended CA return?

[MelsTTC]

Turbotax claimed my 2nd amended return had been accepted, yet FTB did not receive them.  I was told if I knew the DCN number I can request FTB to search for my return.  Please tell me how I can deduce my DCN number. 

I have been using TurboTax since 2014 w/o problems.  Now that I need to amend my CA taxes, I ran into lots of problems.  a) Turbotax no longer supports Desktop versions on and before 2019.  b) my 2022 CA tax that I needed to amend for the second time is failing electronic submissions, despite turbotax claiming my amended returns were accepted.  -Original and 1st amended returns had worked, they got e-filed,  FTB had received them timely.- 

[rjs]

You have to call TurboTax support to get the DCN.