In relation to this post:
I went to my account but I don’t see any extend option, only adding seats and moving into Server version:
I remember I extended one time one year the license. Do we have only one opporunity to extend the license?
You can extend your license within twelve months before it expires. From your screenshot it looks as if your license already receives updates until June 2027 so it’s simply a bit too early.
Ah, ok. Then lost the offer window. 
No issue.
I don’t think you did. You probably used the offer window 
Yes, I did it, but I expected be able to increase the years with discount. As said, rules are rules. No grief about this.