You can update the timesheets from the web app of Remoty.
In the Timesheets section, select the records you are looking for and want to update.
A drawer will open which will have an edit button on the right side. On clicking the edit button you can change the records.
The updated records will be sent to your manager who can either approve or disapprove your amendments.
The changes will be automatically updated and reflected in your timesheets.