On Classcard, an Invoice is broken into three parts:

Header (bearing your business and tax information and logo).
Body (generated while invoicing).
Footer.

To customize any of this information, follow the below steps:

Click on Setup.
Click on the Invoice Format tile under Invoicing



Watch this video to understand better:



😎Bonus: You can select your rounding off preference for totals and Classcard will keep track of the values rounded in all your reports.