As usual, I did a quick search to see if this was already a topic, but didn't see anything. Apologies if I missed it.

As of now I have a flight in July. Business Class starting on QR and ending with AC. I already know that I will to check an extra bag, and have been trying to purchase it before hand so I can save. Unfortunately, the option is not showing on the Qatar Airways website where it should be and I'm not seeing anywhere else on the site to purchase the extra. Any suggestions? Has the option been removed complete, or am I just not able to do it with my booking?