I appreciate the screenshot you've provided for your concern, proj. Since you've followed the standard basic troubleshooting presented by my colleague, I suggest re-importing the invoice template using another supported browser. So we can identify if its data damage issues.
Also, you can follow these formats to successfully importing custom invoice templates: Importing Custom Invoice Templates into QuickBooks Online.
However, If you're still getting the same effects, I recommend reaching out to our Customer support team, they have the tools to pull up your account in a secure environment and to investigate what causes this issue.
Before diving in, I want to ensure your issue gets prioritized and addressed on time, thus I'll be providing this resource for the support hours. It contains the time on when the support is available, depending on your type of subscription. Just go to the QuickBooks section of this article for more info: Contact QBO support.
Here's how to contact our support team:
- Sign in to your QuickBooks Online company. Then click Help (?).
- Click Talk to a human.
- Choose Talk to a human.
- Press See examples.
- Enter your concern.
- Tap Contact us.
- Choose either:
- Post a question
- Message an agent
- Get a callback
Please refer to this article for the succeeding steps of the import process. It also includes the EZ Map List specified above and other frequently asked questions about importing form styles in QuickBooks Online: What are the steps and things to consider in importing custom form styles in QuickBooks Online?.
Please let me know how it goes. I'll be here to help in case you have other questions about managing your invoices' custom form styles in QuickBooks. I am always here to help. Take care!