There is not a marriage tax credit on a federal tax return.
If you are filing as Married Filing Jointly then your standard deduction on the Form 1040 Line 12 is $27,700 if you are both under the age of 65.
Standard deductions for 2023
Single - $13,850 add $1,850 if age 65 or older
Married Filing Separately - $13,850 add $1,500 if age 65 or older
Married Filing Jointly - $27,700 add $1,500 for each spouse age 65 or older
Head of Household - $20,800 add $1,850 if age 65 or older
