It's nice to have you with us in the Community today. Let me help you reset the page margins of your invoice.
You can make the invoice fit on only one page by resetting the margins. Here's how: 1. Click the Gear icon and select Custom Form Styles. 2. Locate the invoice template you’d like to modify then click Edit. 3. Go to the Design tab. 4. Scroll down and click on Edit print settings. 5. Click the blue Reset link to change it back to its initial state. 6. Click Done to save the changes.
Once done, try printing the invoice to see if the troubleshooting works. If not, you can go back to the settings and make manual adjustments.