You can print and mail the tax return to the financial firm.
Or you can send a PDF of the tax return to the website.
Or you can scan the tax return pages and then send the pages as an email attachment.
Or you can take a picture of the printed pages and send the pictures to the website.
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)