Note that external transfers from iwantmyname to another registrar are initiated at the other receiving registrar.
For most outgoing transfers you'll need an Authorization Code (also known as an auth code, EPP code, transfer code, and other terms). This code is located in your dashboard.
To access your Authorization Code, when you login to your account, click on Domains in the main dashboard menu, and on the next page click on the name of the domain that you want transfer. On the following page the code is located to the right of Transfer Auth Code.
If the code is hidden, that means the domain is still locked. You will need to remove the registrar lock (or transfer lock) which prevents unauthorized transfers to another registrar. (Note: registries for some ccTLDs, e.g. .IO, do not offer a locking service, and so no lock needs to be removed before transfer.)
To unlock your domain, while on the same page, click on unlock to the right of Transfer Lock.
Please note that some domains cannot be transferred in the first 60 days after registration. This is an ICANN / registry policy over which we do not have any influence.