We have moved some things around this year. 

Look at the top left corner for "My Account & Returns" and click

Click "start a new return" and you are ready to carry on. 

See the picture for more detail. 

Yes, I see that, however, I'm asked to select a level of service with costs involved. I was under the impression that I already purchased a code for 8 returns.

You will be asked the code at the payment screen.