How do I add/extend my seedbox by a month?

Posted May 29th, 2019 955 0 seedbox extend add month plan how

Hello,
I can't seem to figure out how to add a month to my seedbox. I thought I'd only need one month but it looks like I will need to extend by a month or two. Do I just sign up for another month and it extends my current one automatically? Or is there somewhere I need to go?
Thanks.