easyJet, for example, will let you print out boarding passes months before your flights, but Ryanair will only allow you to print out boarding passes 15 days before flights. So perhaps its still too early to print the passes for your return flight?
It would help to know which airline you're flying with.
Ah, that seems to answer your question!
On the page that you've probably just used:
https://www.bookryana...ulture=en-gb&lc=en-gb
you'll see that it states "Passengers can check-in online from 15 days up to 4 hours prior to your scheduled flight departure".
Unless your trip to Majorca is a very short one, it's still too early to check in for your return flight. As soon as you're within the 15 day window, you'll be able to do so.
I noticed at Manchester airport recently some enterprising person has set up a print-you-own boarding pass setup. Maybe there's one where you are flying back from.