I will try to edit custom style invoices but one error is there i.e. You do not have access to save the company information. Please Resolve it.

I can help share some ideas about the error message, sachin-awasthigr.

You must be the Master or Company Administrator to access all features in Quickbooks Online. You'll want to check your user access rights and modify it.

Here the steps:

1. Go to the Gear icon and select Manage Users.
2. Review the Access Rights.
3. Select the User name and click Edit to make changes.
4. Click on Save.

To learn more details about the access rights in QBO, please check this out: User roles and access rights in QuickBooks Online.

I'm always here if you have any other questions regarding user access in QBO.