Here is the info and links I was able to find, hope this helps. 
1 - https://quickbooks.intuit.com/learn-support/en-ca/about-quickbooks/return-quickbooks-desktop-for-a-r...

This explains the steps, not sure what version you have. 

2-  https://km-ext.ebs-dam.intuit.com/content/dam/km/external/salesforce/7000s/7800-7999/7966_01.pdf

This link is the form you need to fill out. 

3. this is the email address.. 

You may send your documentation Attention: Returns Department to:
-Fax: 1-888-829-1724
-E-mail: [email address removed]