If you receive French family benefits (e.g. if you receive housing benefit), you will find the amount of your Family Quotient on your Caisse d'Allocation Familiale benefit payment certificate.
You can find this certificate on
In both cases, you should have your beneficiary's number your personal identification number.
Students who have recently arrived in Grenoble should apply directly to the Grenoble CROUS, which is in a position to provide you with a certificate stating your income, so that you are also able to take advantage of the affordable pricing scheme.