Navigate to the Billing tab of the side toolbar

Select Rate Schedules in the top right tab

Select the rate schedule that you want to edit

In the rate schedule pop out tab select Revisions

Select the current active revision

Click New Revision

Here you can choose to direct copy or % Adjust all charges by a selected percent

Clone revision

Select the new draft revision of that rate schedule

Set revision valid from and revision valid to date (Note these are just for your reference and will only give you warnings when the new rate schedule will need to be published and activated)

Complete all the required changes to the rate schedule & double-check that you are happy with all the changes made

Click Publish

Press Activate