Hello @sam28
Thank you for reaching out on the community and telling us about your issue. I do apologize for the issue you're having. I was taking a look to see if there was a way and did notice that Quicken should default you to the last account you used inside of the online center. Do you have more than one account or does it change at random? You if you could test this as well see if that's the case. Let us know if you're seeing differently.
Thanks,
Quicken Francisco