How to upload an App to the app store? Help

Hi Everyone…

I am uploading an app to the app store, What is exactly the very next step after

delivering your app with application loader?

I just did that

–it gave me the WARNING for the 64 bits, and the “thank you sign”

So I think I deliver the zip already…

When I go to iTunes, I click on the left button “Submit For Review”

– You must choose a build…

and under the page in BUILD

Submit your builds using X code 5.1.1 or later… ( I have Xcode 6.1.1)

and just just upload an app yesterday…

but I don’t see the blue + sign in build

yesterday I got it by luck or something

So the question is what EXACTLY I have to do the get the blue + symbol in the build area?

Thanks