Can vendor invoices be posted to closed projects in QuickBooks online? It appears so

Hi ecmacchukboy,

Welcome to Community! I'm glad to see you reaching out! When using the projects feature in QuickBooks Online, there isn't a way to add items when it's been closed.  However, you can re-open the project.  I'd be happy to assist!

To re-open the project, follow these steps:

1. Go to Projects in the left menu

2. Under Actions, click the drop-down arrow and mark as In Progress

3. Add the transactions and then mark the project as Complete

Please be advised that adding any paid invoices to a project will disconnect the attached payment.  Here's an article to assist you with adding existing invoices to Projects.

If you have any additional questions or require further assistance, please don't hesitate to reach back out.  We're glad to help!