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Welcome to the QuickBooks Community, @whitney6.
To fix the wrong project, you can edit directly the Timesheets created in QuickBooks Online (QBO). To review, edit, and approve employee timesheets inside QBO, you only need to click on the Approve Time tab in QuickBooks.
For your reference, you may visit this article: TSheets Time Tracking is Inside QBO.
Also, I've added this helpful article that will guide you to accomplish payroll task in QuickBooks Online: Year-end checklist for QuickBooks Online Payroll.
Should you need anything else, don't hesitate to comment below. I'm always around to help if you have other payroll concerns. Stay safe and take care always.