How do I add to my invoices that there will be a 2% interest charge per month compounded monthly?

Hi browningsroofing,

Thanks for connecting with us here. QuickBooks is a powerful program that helps you manage your accounting with ease. I'll be glad to share more info so you're on the right track with your work. 

Recording your transactions the right way is essential for ensuring your books remain accurate. The program allows you to add messages to your invoice. Here's how you can enter a message in the footer field of an invoice: 

1. Navigate to the Gear icon at the top, then Custom Form Styles.
2. Choose New style or choose the type of transaction you want to customize.
3. Click on Content.
4. Click the boxes under Invoices and other sales forms or Add payment details and footer to enter any information.
5. Save changes.

Let me know if this info helps. I'm here to steer you in the right direction.