First method: Using Form W-4 worksheets
Personal Allowances Worksheet
Exemptions | One exemption brings you one allowance For details see : How many exemptions can you claim |
Only one job | If any of the following apply , you can claim an allowance:
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Head of household filing status | For details see: Understand your filing status |
Child and dependent care credit | If you expect to claim credit for at least 1,800 of care expenses. Qualifying expenses are those you pay for the care of your dependent who is not able to care for himself/herself so that you can work or look for work. |
Child tax credit | For details see: Child Tax Credit |
Deductions and Adjustments Worksheet:
- Make sure use each amount you reasonably can expect to show on your return. Do not use more than:
The amount shown on your 2009 return + Any additional related amount that you can prove has happened or will happen
- Here nonwage income means your estimated total nonwage income (other than tax-exempt income). It includes interest, dividends, net rental income, unemployment compensation, alimony, gambling winnings, prizes and awards, hobby income, capital gains, royalties, and partnership income.
Two-Earners/Multiple Jobs Worksheet:
- Multiple Jobs: you only need finish one set of worksheets and split your allowances between the Forms W-4 for each job.
- Married Individuals filing jointly: you and your spouse work on one set of worksheets and split your total allowances between you and your spouse Form W-4.
- Married Individuals filing separate return: you should use separate worksheets based on your own individual income, adjustments, deductions, exemptions, and credits.
Supplement: Alternative method
You determine your allowances based on 3 things (withholding schedules, tax rate schedules, and the estimated tax worksheet). It will take into account the items of income, adjustments to income, deductions, and tax credits.
PSQ
Source: http://www.irs.gov