This is a step-by-step breakdown of how to set limited pickup and returns.

Go to Settings → Car Rental → Advanced tab.

Find the Enable Limited Pickups and Returns per Time setting and set it to Yes, then click on the Save button at the bottom of the page.

Then, you will see the Pickups and Returns per Time section available at the bottom. You can select the Start Date, End Date, Start Time, End Time, Pickup Location, Number of Allowed Pickups, and Number of Allowed Returns.

After you have made the changes, click on the Save button.