The option to apply your coupon to an Xfinity On Demand rental or purchase is pre-selected.
If you want to use your coupon as a credit on your bill, click Select a different way to apply your coupon, then click the radio button next to Apply as a credit to your monthly bill.
After you've made your selection, click Activate.
Verify that the coupon has been applied to the right place. If you selected the rental/purchase credit option, you'll see your current balance each time you sign in to https://comca.st/3j8M6Kl, as well as the option to view your balance history.
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