Can I link an existing invoice to a new project?

Yes, you can link existing invoices to a new project in QuickBooks Online, @info2120. Just a friendly reminder: please exercise caution with invoices that have already been linked to payments, as editing them can cause the payment connection to break.

To ensure everything goes smoothly, the best time to incorporate existing invoices into projects is before they have been connected to any payments. Here’s how you can easily add an unpaid invoice:

1. Navigate to the Sales section and select Invoices.
2. Locate your unpaid invoice and click on its corresponding View/Edit option.
   
   
    
3. In the Customer dropdown, choose your project.
   
   
    
4. Finally, click Save or Save and close to apply your changes.
   
   

For more insights on managing paid invoices before you make edits, I recommend checking out this informative article: Add existing invoices to projects in QuickBooks Online.

Furthermore, if you're interested in gaining deeper insights into converting your sub-customer into a project, I highly suggest visiting this content: Change sub-customers into projects.

If you have any further questions about managing your invoices or projects within QuickBooks Online, please feel free to reach out. We’re here to help, and the Community is always ready to assist!