Anyone know if the QuickBooks online server is down? I can login but I cannot create an invoice.

Welcome to the Community, @crshay. Allow me to share some information about this.

As of now, there's no publish outage of the program. You can visit this link to check the status of QuickBooks products for any announced maintenance.

Let's do some troubleshooting steps to fix this unusual behavior of the program. To begin, start by opening an incognito or private browser window. You can use the following keyboard shortcuts for the most popular browsers: 

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Microsoft Edge: Ctrl + Shift + P
• Safari: Command + Shift + N

Once you have opened the browser window, log in to your QuickBooks account and see if you can create an invoice. If you can, proceed to clear your browser's cache. This process will remove and fix specific issues and help the program run optimally. Additionally, you can use other devices and supported browsers to ensure everything works as expected.

Additionally, I would like to ask if you have encountered any error messages when attempting to create an invoice. Attaching a screenshot would be appreciated to further specify the root cause of your issue. 

After accessing your invoices, you can check this article on how to personalize your sales forms: Customize invoices, estimates, and sales receipts in QuickBooks Online.

Reply to this thread if you have more questions about your invoices. The Community is always here 24/7 to provide assistance. Take care, and have a good one.