To print the currently selected file, click the File menu item that shows the name of the currently selected file.

Notice that there are also several other menu items for printing generated files:

Print all MCHP C18 files tells TCPmaker to print all generated files for the currently selected compiler, which happens to be Microchip C18 at the moment.

Print ALL Code Files tells TCPmaker to print all the generated files for ALL compilers you generated code for.