You should both complete a W-4, and check box 2(C).
Enter each spouse's income on the other spouses form.
If you worked more than one job, or your spouse works, you will receive W-2s from multiple employers. If you have multiple sources of income, you must combine all of the income to determine your tax.
- The first $15,750 (the Standard Deduction if filing Single) isn't taxable. That is the way the payroll system works. They estimate your income for the year and calculate the tax with that deduction included.
- However, if you had a second job, and failed to tell your employer the amount you earned, or expected to earn in the first job, the payroll system would give you the same deduction a second time.
- This would most likely result in you owing additional tax on your tax return.
- This situation is true for all other forms of income you may earn.
- To avoid this circumstance, you should provide your employer with a Form W-4.
For more information, see,
Your withholding may not be enough to cover other income
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