After you file

Update here (shelter at home providing an opportunity).

I said I would try opening the mac created .pdf on a PC to see if it made a difference in the availability of the ToC.  The answer is 'no.'

@macuser_22 I'm aware of the way to show the table of contents in Preview on a mac.  The screenshot I shared where the table of contents was missing was after specifying View-Table of Contents as you have also shown.  

I opened a .pdf (created on ttax *on a mac*) in the latest available version of Acrobat Reader *on a PC.*  I still see no table of contents.  @SteamTrain I understand the symbols you showed indicating how to display the table of contents and have done so many times with Acrobat Reader.  You can see in the attached snip that the ToC option is absent for this document when displayed on a PC.  

So my conclusion is still that the error is with the Mac version of ttax and needs a remedy.

Thanks all and stay safe!