After searching for your prescription, you'll see a list of pharmacies and prices. You should also see some dropdown options with blue text just above those listings. There are sections where you can select brand or generic, form (e.g. tablet or cream), dosage (e.g. 100 mg), and quantity.
Click on each available drop down option, to change the drug from generic to brand or select your correct form, strength, and quantity. The prices will reload to show you coupons that match your prescription at pharmacies in your area.
(i.e. change from tube of gel to capsule)
Click on the tab that shows the listed form, and a drop down menu will appear with all of the available forms to choose from. Select the Form that matches your prescription.
(ex. Change from 300mg to 150mg)
Click on the tab that shows the listed strength, and a drop down menu will appear with all of the available strengths for your selected form. Select the strength that matches your prescription.
(ex. Change from 40 capsules to 100 capsules)
Click on the tab in the Prescription Settings header that shows the listed quantity, and a drop down menu will appear with a few options to choose from. If you don't see your quantity in the options listed, locate the "enter a custom quantity" box at the very bottom of this drop down. Enter your customer quantity into this box, and select the blue "Set" button.