How do you reset the inspection warning on the 2007 new Vauxhall Zafira?

Try pressing the "reset button" for the trip meter, pressing the brake pedal, and while holding them bot "pressed" turn the ignition on without starting the engine.

If that does not work it needs to be done by a Vauxhall agent.

If it was serviced recently by a Vauxhall agent just take it back and ask them to finish the job, as resetting the indicator is part of the service.