1. Click on Admin
Click Admin, the last button on the menu bar at the top of the page.
2. Click on Clients
Next, click Clients, located under the General heading.
3. Click on the Client name
Click on the line item of the client whose mileage rate you're changing.
4. Click on the Mileage Rate tab
Click on the last red tab, Mileage Rate.
5. Click on the Change Rate link
Under the current mileage rate, click on the link that says Change Rate.
6. Enter the New Rate
In the Set Rate window, enter the new mileage rate.
7. Enter the effective date
Enter the date when this mileage will become effective. You can also set up a future mileage rate change.