https://www.irs.gov/tax-professionals/iris-application-for-tcc

"Access IRIS Application for TCC"

Select the organization you applied the TCC under - It should say "IRIS TCC" under the Application Type".

It will then list the organization's application - click on the "eye" under View/Edit.

Go down to the bottom of the page under "TCC Information" and it will show the TCC code - mine is 5 alpha-numeric digits.

If your application status at the upper right of the page does not say "Completed" - it is still in the process of being issued. 

This is the IRIS help line: 866-937-4130