How much money will you receive for a one-year-old dependent when you file your taxes?

Without having your filing status (Single, Married Filing Jointly, etc.) and income, it's not possible to determine your tax benefit. In general terms, your one-year-old dependent is entitled to a dependent exemption. That exemption reduces your income by $3,650, in addition to whatever other exemptions (your personal, your spouse) you have. Also, your child may reduce the amount of tax through certain credits (such as child/dependent care expenses). Furthermore, depending on your income and filing status, you also may be eligible for other credits such as earned income.