Hello there chrisgr, Welcome to the Forums! I hope you enjoy your experience:)
I saw your post about not having the option to print on both sides. This model does not come with the Duplexer accessory in the box as it's an optional part. You will need to purchase it separately to have the option to duplex print.
Here is the info I have found for you from the HP website:
I hope I have answered your concern!
Enjoy your Thursday:) Thanks for posting!