Why can't I print my completed 2018 federal return. It only prints the state return,

[tygrtchr]

From the print center on the program, choose what you wish to print and save it as a pdf to your computer.  Go to that downloaded pdf on you computer and print using your computer prompts.  You not only have printed your return, but you have a copy on your computer for further reference.  Make sure you have chosen the federal return from the options on the left side of the box.