Hi Kate,
To be able to use closet catalogs, you would need to have had purchased the closet add on for your license.
If you have a 2020 Design Complete license, closet would need to be purchased as an add on.
If you have a 2020 Design Live license, then you should be able to see the catalogs in the program. – If you have this type of license, then I would suggest to contact our support department – 1.866.697.2020 – for assistance.
Regards,
Kris