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There are 7 options that admins need to consider, include:

 Sync  Sync Payment, Sync Shipping Methods, Sync Tax Rates: Admins will need to sync three fields before using this extension (mustMust).

 Sync  Sync Customers: If admins will need to sync this data if they you want to sync the old customers, please click on the Sync Customer (Optional).

 Sync  Sync Products: If admins will need to sync this data if they you want to sync the old customersold products, please click on the Sync Products (Optional).

 Sync  Sync Orders: If admins want to sync the old orders, it is forced that admins will need to sync these fields above beforeall data above (payments, tax rates, shipping methods, customers and products).

 Sync  Sync Invoice: If admins want to sync the old invoices, they admins will need nee to sync orders before.

How to sync data from QuickBooks to Magento 2

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