Hi there, tony70,.
Two factor authentication that requires a verification code for every login are generated depending on the security protocol your bank has implemented. QuickBooks depends on information shared by the bank.
Meanwhile, I'd recommend contacting your bank's Customer Care Team. They can help you verify if there's a way to automatic updates your bank feeds without the two factor authentication.
Don't hesitate to ask if you have other questions related with QuickBooks I'm always here to help you.