How do I get Xbox game pass ultimate for a year

No, If you are not game pass ultimate member,

and you have 1year xbox gold live and 1yaer xbox game pass,

you have $1 discount xbox game pass ultimate too,

so you will get 1 year (gold) + 1 year (game pass) + 1 month (ultimate)

= 25 months xbox game pass ultimate

There is no 12 month game pass subscription cards

You can buy GP time in blocks of 3 months, and store up to 3 years of subscription

I looked online and you can get a 12 month game pass subscription for $70 where I pay $30 every three months... is this valid?

To get Xbox Game Pass Ultimate for a year, you can purchase a 12-month subscription from the Microsoft Store or from a retailer that sells Xbox gift cards. To change your Xbox Game Pass subscription from monthly to yearly, you can go to the Xbox Game Pass section on your Xbox console or on the Xbox website, select "Manage," and then choose the option to switch to a yearly subscription. Keep in mind that you may need to pay the full cost of the yearly subscription upfront.

(MS store not the xbox store fyi)

Can you make a tutorial showing us how to do this?