How do I add a second description field for invoicing template on the Easy Start plan

Hello jblai011,

Welcome to Community!  I can understand the benefit of having the option to add a secondary description on your invoices.  QuickBooks Online let's you customize your forms, to suite your business needs.  

To see how to customize your forms in QuickBooks Online, click here.  In addition, you can add custom fields.  If you would like to see additional options, please don't hesitate to submit a suggestion to the Development Team.  Recommendations are greatly appreciated in assisting with future updates and feature updates, to improve your overall customer experience with QuickBooks Online.

If you have any other questions, feel free to reach back out.  We would be glad to help!