It's good to see you here in the Community, usermarc.
For now, all QuickBooks Checking accounts are FDIC insured to the standard limit of $250,000.
If you'd like to raise the limit, I'd suggest getting in touch with our Merchant Services Support. They handle everything related to QuickBooks Checking accounts. Reaching out to them also ensures that your sensitive information is protected.
I'll be leaving you the following write-ups below. These will provide you with details about how QuickBooks Checking accounts work as well as handling the cash flow in QuickBooks Online:
Learn more about QuickBooks Checking accounts and the Cash Flow menu.
Use your QuickBooks Checking account.
I'll be around to keep helping if there's anything else you need. Don't hesitate to drop a reply below. Have a good one!