When using Gazelle's free Hobbyist account, you will not be required to enter a credit card to use your account. However, if you would like to utilize SMART scheduling and the ability for your clients to self-schedule online, you will need to add a credit card to your account
You can do this by going to Settings, and selecting "Details & Make Changes" under the Billing box
Under the Credit Card box you can add, change, or remove the card you have on file. After making the changes you want, scroll down to hit save
That's it! You're ready to roll.