For a 2018 US Federal tax return if you file as Married Filing Jointly you receive a Standard Deduction of $24,000 if both are under age 65. Since you have a child under the age of 17, if you claim the child as your dependent then there is a Child Tax Credit of up to $2,000. Based on your Earned Income and Adjusted Gross Income you may be eligible for the Earned Income Tax Credit.
The child must have a Social Security number. Both you and your spouse must have either a Social Security number or an ITIN issued by the IRS.
See this IRS website for the Child Tax Credit - https://www.irs.gov/credits-deductions/child-tax-credit-and-credit-for-other-dependents-at-a-glance
See this IRS website for the Earned Income Tax Credit - https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/eitc-income-limits-maxim...
