I'll make sure that you can import your timesheet data into your QuickBooks Online account in no time. And I'm happy to walk you through the detailed steps to achieve your goal.
I agree with Fiat Lux - ASIA that you can use the importer tool to upload your timesheets into your account. To get an application that can help you accomplish this, follow the steps below:
Select the Apps tab on the left side.
Type importer in the search box to expedite the process.
Choose the one that best suits your need the most.
Follow the on-screen instructions to download and install the app.
After that, open the app you installed and follow the online instructions to import the timesheet data into QBO. You can also visit their community page or reach out to their support for further assistance.
Once done, you can now view, add, and edit time entries of your clients in QBO at any time. For more details, visit this link: Track and manage timesheets in QuickBooks.
Check out this article below on how to auto-sync edited time entries that are in QBO to QB time and other related questions: