Why did the amount I owe go up when I put my sons income? he is in high school and only made 4301.18 before tax

[kaloupa]

My son is 20 but due to his mental health, has had a hard time finishing school and still lives at home and is trying to finish his high school

It is not suppose to cost me more to declare him living with me. 

[TonyC11 · Accepted solution]

If you are claiming either Infirm Adult Dependant credit (line 306) or Caregiver credit (line 315) with Family Caregiver Amount then the credit is reduced by the dependants income.

Your son also should be filing a tax return.