Same issue, every since 2021 when RBC implemented 2FA. Quickbooks has admitted fault in a handful of forum posts here, even dating back as far as 2021 and yet still no fix. This is bonkers. Quickbooks chat support rudely told me that I had it wrong and that it was RBC's fault and I should call them. Then I showed the QBO chat rep the forum post and they didn't even respond to it. Getting increasingly frustrated. Same issue as everyone else. QBO tries to update, sends request to RBC, RBC app tries to authenticate when I don't have my phone and then it locks out the account and I have to sign in again on QBO. Every d*mn time I want to update my accounts. This is isane. Intuit, fix this or I'm going to Xero.