You will want to perform an import each time you've updated something in Reckon that needs to also update in TSheets (e.g., updated team member name, new customer, etc.).
To perform a sync, you must be logged into Reckon as the main admin and in single user mode. Also, you must use the computer that the TSheets integration is set up on.
Performing a sync in the Web Connector performs an import during each sync and an export if there are newly approved timesheets.
How to Import:
Open Reckon and the Web Connector on the same computer.
Select the appropriate company file, and click Update Selected.
