I’d love to help you successfully input invoices in QuickBooks. But I’d appreciate if you can provide me additional details about this.
Are you not able to click on the Invoice option from the Gear icon? Or did you receive an error message while trying to create an invoice?
In the meantime, let’s perform some browser troubleshooting steps. This way, we can isolate if this is caused by overloaded data in your default browser. You can try creating an invoice using an incognito tab.
You can use these keyboard shortcuts in opening an incognito tab: