How can I creat Sub Accounts ?

I created Sub Accounts, but I don`t know how to acess to these accounts.

How do I create passwords to Sub Accounts?

Please check this guide to learn more about sub users and sharing forms: https://www.jotform.com/help/232-How-to-share-forms-with-a-sub-account-user. Basically, sub users can be regular accounts or accounts that were created by an invite you sent. An account becomes a sub user when you share your forms access to them.

I hope that helps.