Hello marney,
It's awesome to hear that you're already looking forward to next year for your business.
I'm happy to say in QuickBooks Online you can pick the year you need when you're going through the steps of setting up your budget. After going through the Plus (+) icon and choosing Budget, you'll see a field to enter a name for the budget and then right beside that is the drop-down menu for the Fiscal Year. Select the one you need and you'll be on your way!
Learn more about budgets in QuickBooks Online here: Create, edit, and manage budgets
Have a great rest of your day! I'm here if you have further questions. :)