Providing the best experience with the QuickBooks Online (QBO) product is what we aim for, @Prabhu.
I want to make sure to cover every concern you have here in the Community. You can share with me the details of the issue regarding your invoice template. This way, I can provide the exact resolution for it.
In the meantime, I'm adding this article to further guide you in personalising and adding specific info to your invoice and other sales forms in QBO: Customise invoices, estimates, and sales receipts in QuickBooks Online. It includes topics about custom fields and editing your company info, to name a few.
Please don't hesitate to comment below about the details of your concern. I'm just around to help. Take care always.
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