Hi Admin1998, I am a QB desktop user like you, spent 6 hours trying to stop this madness, then finally stumbled on the simple solution from another user.  I used, it works.

Solution to close Intuit Account window without logging on:

Alt-F4 combination, the click Cancel

Regular QB home should appear, now click tabs to prevent the problem from coming back:

- EDIT

- go to bottom tab for PREFERENCES

- window opens, middle of list click INTEGRATED APPLICATIONS

- click COMPANY PREFERENCES

- click box DON'T ALLOW ANY APPLICATIONS TO ACCESS THIS COMPANY FILE

Close and you are done.  I saved a back up at this point, exited QB, then restarted.  If you have more than one company in your QB desktop program, I suggest you execute this for all your companies.   This closes down the annoying login Intuit keeps throwing at us as documented in this discussion.  They are afraid to give you the simple solution because they want to control customers data and force us into more Intuit products.  They don't get it, if we find QB annoying and are getting pushed around, we will go elsewhere.   BTW, I have used QB desktop for +20 years, won't get to 21 years if this keeps up.