Design DDS by Quartus

I am designing DDS (Direct Digital Synthesis) using Quartus

.

I was told to use the Megafunction wizard, but in the Quartus prime version it was gone and instead I designed and generated the NCO at the desired frequency using the NCO IP in the IP catalog.

I have created several .v files, but which one should I use?

What is my next step?

I need help.