From the top right ‘gear’ icon we have a Company option, which will allow you to click the red ‘x’:
Once this is done you can confirm the deactivation as of the ‘current’ month.
Once the company is deactivated (as of the deactivation date), the company is inaccessible, and all data will be deleted 90 days later, after the deactivation date.
This data is not restorable, and it is very important that all the data is obtained prior to the deactivation date.