If timesheet approval setting is enabled you can go ahead and start approving timesheets.

Feature Availability: Express, Premium, and Enterprise plans.

1. Navigate to Projects and choose a project.
   
2. Click Timesheet to view the entries in the list view.
   
3. Hover over a record and click Approve or click Reject and provide a reason for rejection. (or)
   
4. Select one or more records and click Status to mark the timesheet(s) as  Approved or Rejected or select Pending if you want to put the timesheet(s) on hold. Also, change the Billing Status between billable and non-billable.
   

• In List view, the timesheet entries can be filtered based on their approval status for billing. Also, while generating the invoice, only the approved timesheet entries are billed.
  
• When Time Log Restriction is enabled, you cannot update the status of the time logs that exceed the log hour limits using bulk update.
  

  View note(s) for log entry

1. Navigate to Projects > your project > Timesheet  > List view section.
   
2. Hover over Show Notes against a time log entry to view notes.