Ok ...  now you are talking about systemic issues and before you transferred the 2019 info to the downloaded version you should have checked online first for the changes.  In the downloaded version you have the option to turn off the updates after you have filed but not so with the online version. So what you downloaded was not what you filed but what was updated and this is a problem for you.  Not sure what the changes were since you filed ... those you will need to figure out yourself ... hopefully you saved a PDF of the return as filed so you can look and compare them. 

Now ... why do you use the ONLINE version and then  download the "amendment" program after the fact ?  The 2019 amendment program is not even available yet ... will not be until November at best.  To complete an amendment  using the current 2019 online program it must be done online. 

May I suggest you start and finish with the downloaded version and skip the switchover ... as you can see it has unintended consequenses.   If you shop around you can get a cheaper price outside of TT just stick with the well know resellers ... remember if the price is too good to be true then it probably is pirated or has malware in it.   All you ever need is the Deluxe version (Basic if you do not need a state return). 

This is my mini version of  a tutorial  that should be in the downloaded program: 

Always remember to shut off the auto update function once you have filed your returns and do not do any updates unless you have safeguarded the PDF & .taxfiles to a removable storage unit for safekeeping.

What is Forms Mode?

Forms Mode lets you view and make changes to your tax forms "behind the scenes."

If you're adventurous, you can even prepare your return in Forms Mode, but we don't recommend it. You may miss obscure credits and deductions you qualify for, and you may forget to report things that will come back and haunt you later.

Forms Mode is exclusively available in the TurboTax CD/Download software. It is not available in TurboTax Online.

Related Information:

• Why would I use Forms Mode?
• How do I switch to Forms Mode in the TurboTax for Windows software?
• How do I switch to Forms Mode in the TurboTax for Mac software?

If you want to play around with different figures and tax scenarios without affecting your original return you can ….

• >>>In the TurboTax CD/Download software by creating a test copy: 
• 1.  Open your return in TurboTax. 
• 2.  From the File menu, choose Save As. 
• 3.  Give the copy a new name to distinguish it from the original (for example, by adding "Test" or "Example" to the file name). 
• 4. Click  Save. You are now safely working in the test copy and anything you do here will not affect the original. 
•  https://ttlc.intuit.com/questions/1900642-how-to-make-a-test-copy-of-your-return

• >>  use the WHAT IF tool: 
• - Click Forms Icon (upper right of screen) or Ctrl 2 (forms view) 
• - Click on the Open Form Icon 
• - In the “Type a form name.” area type What-If (with the dash), click on the name of the worksheet - click on Open Form 
• - You will see the worksheet on the right side of the screen; enter the information right into the form 
• - To get back to interview mode - click on the Step-by-Step Icon (upper right of screen) or Ctrl 1

It's always a good idea to make a backup copy of your tax data file, in case your original gets lost or corrupted. Here's how:

1. From the File menu in the upper-left corner of TurboTax, choose Save As (Windows) or Save (Mac).
2. Browse to where you want to save your backup.
   • Tip: If you're saving to a portable device, save it to your computer first to prevent data corruption. Then, after completing Step 4, copy or move the backup file to your device.
3. In the File name field, enter a name that will distinguish it from the original tax file (for example, add "Backup" or "Copy" to the file name)
4. Click Save and then close TurboTax.
5. Restart TurboTax and open the backup copy to make sure it's not corrupted. If you get an error, delete the backup and repeat these steps.

If you make changes to your original tax return file, repeat these steps to ensure your original and backup copies are in-synch.

Related Information:                             

• Retrieve a Tax File from a Portable Device
• What's the difference between the tax data file and the PDF file?

AND save it as a PDF so you have access to a copy even if you don’t have the program still installed and operational :

• How do I save my return as a PDF in the TurboTax software for Windows?
• How do I save my return as a PDF in the TurboTax software for Mac?

AND protect the files :

• How can I protect the tax files on my computer?