There are several common reasons why an invoice might not be saved in QuickBooks Online, Ivantan.

To make sure we'll provide the most accurate steps, can you tell us what happens when you save an invoice? Is there an error message?

In the meantime, look for any red highlights or error messages on the invoice form that indicate a required field is blank or incorrect. Common reasons include:

• Missing customer name.
• No service or product selected in any line item.
• Missing tax codes
• "Something not quite right. Check description fields." error.

Aside from that, you can also temporarily log out of your account. Then, log back in using a different browser. QBO is compatible with Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari.

Don't hesitate to reply if you want to share more details. You can also post more questions in the forum if you need anything else.