Has anyone imported invoices from Freshbooks into Quickbooks?

Do you need to migrate data from Freshbooks to QB Online completely, OR sync data between Freshbooks and QB Online? You will need a different solution for each of them.

Just migrate old data. In fact the only thing I really want to migrate is old invoices and estimates. Thanks for the response.

For your reference

https://quickbooks.intuit.com/learn-support/en-ca/manage-lists/common-questions-about-importing-data...

You can import invoices

https://quickbooks.intuit.com/learn-support/en-ca/import-or-export-data-files/import-multiple-invoic...

but you need a 3rd party tool to import Estimates

https://transactionpro.grsm.io/qbo

Otherwise, consider purchasing a 3rd party service to migrate your Invoices and Estimates from Freshbooks to QBO.