After 3 attempts and 5 hours work my new invoice is failing to save. Please help!!!

Let's do troubleshooting, margaret26.

Let's begin by accessing your account in a new incognito or private window of your browser. This way, we can check if this issue is related to your current browser or not. Let me guide you how:

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

Once completed, you can log back in to your account and check if you can save your created invoices. If it's working, you can clear your browser's cache to optimize it. Also, your browser can start from scratch and improve your QuickBooks Online browsing experience.

Stay in touch with me if you need further assistance.