If you want to:
You should use the Export module.
Once you have built a report with the Reports module, you might want to extract the timesheet data related to your selection.
To do this, just click on the CSV icon at the bottom right of the module.
If, when you open the CSV file, the data appear in one single columns instead of several columns, please read how to solve this issue.
If you want to export your timesheet data to Quickbooks, we have a dedicated module for that.