Trying to send an invoice and keep getting error object not found

I have the steps you can take to rectify the error message you’ve encountered upon sending an invoice in QuickBooks Online (QBO), katie.

Before we proceed, let me share some information about the error you received when sending an invoice. Object Not Found error occurs when you’re trying to use has been made inactive. These refer to inactive name list objects (i.e. a customer, vendor, account, etc.) in a transaction.

With this, I’d suggest checking your invoice transaction to see if there is an inactive character added to it. Once certain that there are none, we can send your invoice using a private window. The private window is a helpful tool for troubleshooting browser-related difficulties as it won't preserve any history. 

The following are the keyboard shortcuts:

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

Once you have successfully sent it, switch back to your default browser and delete its cache. The best way to give your browser a fresh start is to clear the cache or cookies. If not, using one of the supported browsers can also be a smart choice.

Furthermore, you can mark this paid once you receive the actual payment for this one. I have an article here where you can refer to keep your records accurate: Record invoice payments in QuickBooks Online.

Moreover, you can utilize various financial reports to get a snapshot of your business's financial growth. I also added a resource where you can refer to the complete guidelines for customizing it:

• Run reports in QuickBooks Online
• Customize reports in QuickBooks Online

If you have any further questions or concerns regarding invoices, please don't hesitate to mention me. I'll be available to provide assistance and support whenever you need it.