Forms to Print for Amended Return

I received form 2439, however I filed by taxes, and had to file an amended return.    

 

I completed the updates in Turbo Tax but the instructions were not clear on what documents to print for the IRS?   It printed off all the forms and I don't want to send in unnecessary paperwork.

 

What do I need to send to the IRS?   Please advise

 

Thank you