If your account has more than 1 company, you will have to select a plan (with the options) for each and everyone of them. To do so, access your company list and select the one you need to attribute a plan to.
Once in the company, press on the upgrade button on the top of the page.
This will bring you to the subscription page.
1- Select if this company is billed annually on yearly.
2- Add options to this budget.
3- Press on upgrade and validate on the checkout page.