If you are responsible for Income tax, you benefit from a tax reduction of 75% of the amount of your donation up to a limit of €1,000. Beyond that, a tax reduction of 66% within the limit of 20% of your taxable income is applied.
If you are responsible for Real estate wealth tax, 75% of the amount of your donation is deductible from your IFI, up to a deduction of €50,000 per year.