While you're logged in to your account https://www.gigwage.com/users/sign_in
Step 1:
From your Dashboard, select Contractors
Step 2:
From the Contractors page, select Import Contractors
Step 3:
From the pop-up, select Download CSV Template
Step 4:
Open the file you just downloaded named gigwage_import_contractors_template
You may edit the file to have as many or few lines as you need to invite all of your contractors.
Here's a link with instructions to export QuickBooks data to your excel spreadsheet: https://quickbooks.intuit.com/learn-support/en-us/exporting-reports/export-reports-as-excel-workbooks-in-quickbooks-desktop/00/226860
Step 5:
Once you’ve edited and saved all of your contractor details in the CSV file, go back to your browser and select Upload Contractors CSV
Step 6:
Select Import Contractors and you’re done! All of your contractors will receive an email to register their Gig Wage account!