I'm having the exact same problem. Starting about two weeks ago, the Get Things Done tab was available on only three out of my four company accounts (all four have a QBO Plus subscription and the subscriptions all started over a year ago). The QB rep that I talked to said it was a known issue (INV-96354) and that QB is working on it. I received an email from QBOCare right after the phone call, and I have not heard back since then. Today, the Get Things Done tab is only available on one out of the four company accounts. I hope they can resolve this quickly.