Hello klrjkent,
When you connect your bank to QuickBooks for the first time, it will download up to 90 days worth of transactions automatically. Though, you can perform a manual update if there are still missing transactions:
- Click Banking on the left menu and go to the Banking tab.
- Click the Update button.
- Enter your Multi-Factor Authentication (MFA) credentials.
- Click Continue update.
Manual update can bring up to 90 days worth of transactions, too.
Another option to bring your transactions to QuickBooks is to import a WebConnect file. You can checkout this article for more information: How to Upload More Than 90 Days of Bank Transactions.
Let me know how this goes so I can further assist you if necessary.