@Hornman
If you are using the "Windows" software....
Once you startup your software, you can go to the top of the opening main screen and
1) Click on the "Online" menu item to get its' dropdown.
2) Select "Updater Preferences"
3) Select "I don't have an internet connection..."
That turns off all future update attempts....but you can always force an update from the same menu dropdown anytime you want by selecting "Check for Updates" (Not sure if MAC people can do that though)
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Myself, I have the Desktop software installed on two computers. Desktop& laptop. I keep a second copy of my submitted tax file on my laptop, and update that laptop software every week....and check the second copy of my tax file there....if there are no changes to my refund/taxes owed on my laptop, I know I can update my Desktop without changing my original tax file. But if my tax file on the laptop ever changes after an update, I won't update my Desktop thereafter. Last year, I didn't have to do that, but I filed well into March after most bugs had been fixed.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
