Worth a discussion with ATC to understand what clearances were issued. Helicopters are cleared to "taxi" on their wheels following taxiways/paved surfaces, or "hover taxi" at altitudes up to 25' AGL and 20 knots following taxiways/hard surfaces, or "air taxi" at altitudes up to 100'AGL (higher if requested) with speed at pilot discretion directly from one spot on the airfield to another. The helicopter is expected to avoid directly overflying other aircraft, buildings, etc.