How to add applecare plan SN#?

[ISKOTB]

I was thinking to buy an Apple Care and extend my MBP coverage. I logged into https://mysupport.apple.com and I selected the laptop but I see no option to add coverage?

 

[KPOM]

Since they switched to AppleCare+, the window to buy online has been shortened to 60 days (it covers accidental damage now). However, I think if you call, you can still add regular AppleCare for up to a year.

 

[ISKOTB]

Thank You