Exactly how it routes through the engine bay depends upon the model year of your car.
If this is a 1996-1998 the line will pass through the purge flow sensor. Then the EVAP solenoid. And then onto charcoal canister in the right hand fender well.
If this is a 1999-2004, the EVAP vacuum line will route along the firewall and then onto the vapor management valve inside the right hand fender well.