I Want to extent the coverage of my Applecare
The warranty on my mac mini expires next month and I want to extend it
Question marked as
As explained in the support document you posted from, you will need to wait until it expires. Then you have 30 days to extend it if you are in one of the supported countries for Apple Care+ Extension.
Purchase the new coverage within 30 days after your original coverage ends. To find out if you can purchase the new coverage, go to mysupport.apple.com and follow the onscreen instructions. The new coverage automatically renews until canceled.