Timesheets is an extension for VTiger designed to elegantly track employee (user) time, with ability to visualize it. It supports custom periods, where you can adjust the length of the period to fit your business. In addition, periods can be locked to prevent any further modifications. It’s simplistic design, makes it extremely easy to log the time and specify the reason, description as well as associate it with an existing record in vtiger.
How to Make Timesheets Read Only
Go to Timesheets
select an Employee
Enable the “Lock” check box.
Click “Yes“. If its locked user will no longer be able to Add/Modify or Delete.