How do i add more columns to my sales invoice. i need market retail price or maximum retail price to reflect on all my sales invoices??

Hello there, @Upstart Enterprises.

I'm here to help guide you in customising your invoices so you'd be able to include the market retail price or maximum retail price to your invoice. Let's get started!

1. Go to the Gear icon.
2. Choose the Custom Form Styles.
3. Locate the invoice template you're using.
4. From the Action column, click the Edit link.
5. Select the Content tab.
6. Click the Pencil icon to modify the contents of the invoice.
7. Mark all the columns you want to display on the invoice. 
8. Click Done.

Also, you can modify the name of the labels of each column. Just click on the Edit Labels and Widths link. 

You can read through these articles to help you add a personal touch to your invoices and other sales forms in QuickBooks:

• Customise invoices, estimates, and sales receipts in QuickBooks Online
• Add, customise, or remove logos on sales forms
• Send invoices in different languages

Visit us here again if you have other questions about creating invoices and other sales forms in QuickBooks. I'm always here to help.