Оникс

На сайте vero.fi , там где тах-calculator, читал это:

"Enter your estimate of the interest on the debt for a first home that you will pay during the calendar year. The precondition is that the home is your first home and that you own at least 50 per cent of it. The deductible interest should primarily be deducted from capital income. If you do not receive capital income or you receive less capital income than deductible interest, a deficit is born. 30 per cent of this deficit is credited the tax-payer against his income tax.
The maximum amount of the credit depends on your family ties and the number of minors supported by you.
The maximum for a single person is EUR 1 400. "

Прошу разъяснить знатоков на конкретном примере - сколько мне вернут налогов. Для простоты возьмем теоретические цифры:

Годовой доход 50000, детей в расчет не берем, сумма займа 120 000.

Спасибо!