To use the credit, shop like you normally would and add your items to your cart. When you checkout you will see an option to apply your credit. Once you click 'Internal Credit' your price will change accordingly.
Just make sure that you are LOGGED in to your Dailysale account when placing the order.
Please click this link to login: https://www.dailysale.com/customer/account/login/
For you reference, please see screenshot below:
You may locate this option at the lower left part of the check out page:
To help you find your credit, we will provide the steps with screenshots below for reference.
1. Go to www.dailysale.com
2. Login to the website
3. Once logged in, click the My Account Link
4. From the My Account page, scroll down look for the My Credit (link)
5. You will see the credit on the left part. See screenshot below for reference.