To answer your question, I'll need a little more information. Are you operating recreationally under part 101 or commercially under part 107 ()?
If you're operating recreationally under part 101, you're required to give notice to airports (including heliports). More information can be found here: .
AirMap makes this easy by giving you the phone numbers of each of these entities and, in some cases, gives you the option to provide digital notice (more info here: ).