I'd be glad to help point you in the right direction so you can transfer your estimates to QuickBooks Online.
Just to make sure I'm on the same page, are you currently using a different platform to create and send estimates?
If so, I recommend checking out available third-party apps to get the transfers completed. These apps integrate directly with your QuickBooks Online account and provide ways to get a lot of work done, a lot easier. They can be accessed by clicking the Apps tab in the left navigation panel of your QBO account, or by visiting https://quickbooks.intuit.com/app/apps/home/
Please feel free to follow up with me here if you have any other questions.
Are you trying to import an estimate template from a Word document into QuickBooks Online? Let me share the steps with you to get your Word doc in the program.
First, download the entire QuickBooks Online EZ Map Fields Catalog. If you have a custom design in .docx format (MS Word 2010+) ready, you can map it with EZ Map fields. To start fresh, use our samples.
Second, import the file using these steps:
Go to Settings ⚙, then Custom Form Styles.
Click the drop-down list for New style, then click Import style. If you don't see this option, go to Settings ⚙,select QuickBooks Labs, and then turn on Import Styles.
Select Estimates.
Click Upload your .DOCX file field, then find and select your .docx template.
Select Next.
Follow the succeeding steps on how to map the fields.
Let me share these articles with you for additional reference: