I am having the exact same problem (QB Desktop 2020), and none of these replies help me. I am logged into my IA account on QB desktop, everything is linked, I am the admin, and I STILL get emails every couple weeks saying "We noticed you haven’t signed in to your Intuit account for over 180 days. It’s important for an admin to keep company file’s Intuit account active by signing in once every 180 days." I don't know where else I can login. Fortunately everything is still working (I don't use QB payroll), but doesn't make sense to me these emails saying I haven't logged in when I clearly have.