Entering a race is easy. Watch the video below to learn how.

There are many ways to join an official series.

From the iRacing UI (aka desktop icon):

Click the 3 horizontal lines to toggle the Sidebar to open and close

Click Go Racing

    Under that you can choose either Up Next, Current Series, User-Created Races, AI races or Time Attack

In Up Next or Current Series, you can Filter to show what you want to see

and in the results, you can sort by any of the columns, for example, License Group

then click the green Register button for the race (or session) you want to get into

Follow the online instructions and then click Join when prompted: