When a car stalls immediately after you start the engine it could be that the fuel pump is not producing enough fuel pressure to allow enough fuel to reach the injectors.
Sometimes a fuel pump will produce enough fuel pressure to initially start the engine and then the engine stalls as a loss of fuel pressure.
So I would recommend getting the fuel pressure in the vehicle tested to ensure the fuel pressure is good enough to keep the engine running.
The issue could also be the fuel injectors, fuel filter, clogged fuel line etc.
A bad ignition coil or bad ignition coils could also be the cause of a car stalling or a bad MAF or MAP sensor could cause engine stalling as well.