To renew a domain, you must access your SW Panel Once inside, go to the tab Domains and SSL -> Domain Portfolio, which you will find in the blue side menu:
Locate the domain you want to renew, display the options menu that appears on the right and click on "Renew domain"
It does not matter when you renew your domain, it does not matter how long until it expires, you will never lose days of validity. One more year is always added to the current expiration date of the domain.
You will see the text "in the renewal cart", and right at the top it will have been added to your cart. Click on the same cart icon to finish the process:
Indicate the number of years you want to renew it, and click on "accept domain cart"
Domains can only be renewed for a maximum of 10 years.
In a few minutes you will be able to see the new expiration date of your domain.