Need to Update my Account Numbers for the Mac
my bank has upgraded their system, which has changed my account numbers, which wont allow me to sync my account correctly. How can I update to new account numbers.
my bank has upgraded their system, which has changed my account numbers, which wont allow me to sync my account correctly. How can I update to new account numbers.

Try the instructions in the Help section "Adding or editing accounts."
Please post back to say whether that worked or you need more information.
Thanks but I still cant modify the original account numbers I designated to each account when I set up quickbooks. Do I have to start a new account?

I don't use online banking (sorry), but I think that maybe the instructions in the user's guide on page 376 might help. The section, called "To Unlink a QuickBooks Account from an Online Account," talks about what you have to do to link "a different Quickbooks account to imported transactions." That might be what you have to do.