TurboTax Premier 2020 Mac will not open

See this TurboTax help article:

https://ttlc.intuit.com/community/troubleshooting/help/turbotax-for-mac-won-t-open-when-installed/00/26611

Make sure that you are using an Administrator account.
https://ttlc.intuit.com/questions/1899267-administrator-rights-mac

You cannot change or add anything on the return that you e-filed.  It is too late, just like when you put an envelope in a US mailbox

Now you have to wait until the IRS either rejects or accepts your return. Which won't be until Feb 12 this year. If your return is rejected, you will be able to go into your account and add or change it and resend it. Click on Add a State to let you back into your return..

If the IRS accepts your return, then you have to wait until it has been fully processed and you have received your refund or paid the tax due. THEN you can prepare an amended tax return 1040X and mail it in. You cannot e-file an amended return.  Meanwhile, DO NOT change anything on your return until you start the amended return. If you did change or add the missing info then take it out and put your return back to the way it was when you first filed it.

You can check your efiling status here,
https://turbotax.intuit.com/tax-tools/efile-status-lookup/

How to amend an Online return
https://ttlc.intuit.com/community/amending/help/how-do-i-amend-my-turbotax-online-return/00/27577

That is usually because something got corrupted and not all the files got removed. 

If you have followed all the uninstall instructions that I will post below and it still bounces in the dock then there is one more test that you can do to see if there might be some sort of corruption in your User account that is causing the problem.

Switch to another User account that is an  Administrator (or use System Preferences to create one) and run TurboTax from that account.   If that works normally then there is something in your Users account that is causing the problem.  That will probably require a Mac expert to locate and solve.

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Corruption could have occurred in the Application or in an associated preference or support file.

The best remedy is to totally uninstall TurboTax and all associate files and then re-install. That will not delete or change any .tax2019 data file that had already been created with the tax data.

To uninstall the application and all associated files need to be deleted and then the application reinstalled. If there was a state then the state must also be reinstalled.

To remove TurboTax from your computer, you'll need administrative rights.

Note: Substitute XX in these instructions for the 2-digit tax year of your TurboTax software.

Remove the application TurboTax [version] 20XX in the Applications folder.
Version is the version of TurboTax you currently have installed, such as Basic, Deluxe, Premier, Home Business.
In the Finder, select Go Go To Folder.
Enter ~/Library and select Go.
Remove the following files and folders (~/Library represents the Library folder in the current user’s home folder):

~/Library/Application Support/TurboTax 20XX
~/Library/Caches/com.intuit.TurboTax.20XX
~/Library/Caches/TurboTax 20XX
~/Library/Preferences/com.intuit.TurboTax.20XX.plist
~/Library/Preferences/com.intuit.TurboTax.20XX.LSSharedFileList.plist
~/Library/Saved Application State/com.intuit.TurboTax.20XX.savedstate
~/Library/Cookies/com.intuit.turbotax.20XX.binarycookies
~/Library/WebKit/com.intuit.turbotax.20XX
~/Library/Containers/com.intuit.turbotax.mac20XX
(This folder will only appear if you installed from the Mac App Store instead of a CD or download.)
~/Library/ApplicationSupport/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.intuit.turbotax.20XX.sfl
(This folder will only appear for OS X 10.11, El Capitan.)
~Library/Caches/KSCrash/TurboTax

Once you've removed those files and folders:

Empty your Trash.
Check first to that there's nothing in Trash you want.
If you get any errors deleting the above folders from Trash, restart your Mac and empty Trash again.
Install TurboTax again from the CD or download file to the Applications folder.
Start TurboTax from the Applications folder and let it run the updates.
Empty the Trash again.
To make sure everything is working smoothly, restart your Mac again.


Here is a FAQ for how to uninstall Mac
https://ttlc.intuit.com/questions/1901210-remove-uninstall-turbotax-for-mac
Also if present remove: ~Library/Caches/KSCrash/TurboTax

https://ttlc.intuit.com/questions/1901209-reinstall-turbotax-mac

You may need to reset the "permissions" on your Mac. Apple support has the complete directions. TurboTax tech. doesn't think it possible...but it is and worked for me.