MO W-4 Employee's Withholding Certificate Form
The MO W-4 form is used by Missouri employees to indicate their state income tax withholding. It includes instructions for filing status, exemptions, and additional withholding requests. Accurately completing this form ensures proper tax withholding from your paycheck.
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How do I fill this out?
To fill out the MO W-4 form, start by entering your full name, social security number, and address. Next, select your filing status and indicate any additional or reduced withholding amounts. Finally, sign and date the form before submitting it to your employer.

How to fill out the MO W-4 Employee's Withholding Certificate Form?
1
Enter your personal information at the top of the form.
2
Select your filing status from the options provided.
3
Specify any additional withholding amounts if necessary.
4
Claim exemption status if applicable by marking the appropriate option.
5
Review the form for accuracy, then sign and date it.
Who needs the MO W-4 Employee's Withholding Certificate Form?
1
New employees in Missouri who need to establish their tax withholding.
2
Current employees who are changing their filing status.
3
Employees who want to adjust their withholding amount due to changes in income.
4
Military personnel who may claim exemption under specific conditions.
5
Employees who had a tax refund last year and expect a similar situation this year.
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What are the instructions for submitting this form?
To submit the completed MO W-4 form, provide it directly to your employer either in person or via email or fax. For fax submission, use the number provided by your employer or the Missouri Department of Revenue. Make sure all information is accurate and legible to avoid any delays in processing your request.
What are the important dates for this form in 2024 and 2025?
For 2024, employers must send the completed MO W-4 form within 20 days of hiring a new employee. For 2025, similar deadlines apply. Make sure to check for any changes in tax laws that may affect submission timelines.

What is the purpose of this form?
The purpose of the MO W-4 form is to establish the withholding amount for state income tax for employees in Missouri. This form helps ensure that the correct amount of tax is deducted from their paychecks based on their individual circumstances, such as filing status and exemptions. By accurately filling out the MO W-4, employees can prevent under-withholding or over-withholding, which can lead to issues during tax season.

Tell me about this form and its components and fields line-by-line.

- 1. Full Name: The employee's complete name.
- 2. Social Security Number: The employee's SSN for identification.
- 3. Home Address: The employee's residential address.
- 4. Filing Status: The employee's chosen tax filing status.
- 5. Additional Withholding: Any extra amount to be withheld from paychecks.
- 6. Reduced Withholding: Lower withholding amount if applicable.
- 7. Exempt Status: Claim for tax exemption if eligible.
What happens if I fail to submit this form?
If you fail to submit the MO W-4 form, your employer may withhold the maximum state income tax. This can lead to an over-withholding scenario, affecting your cash flow, and could cause you to owe taxes when filing your return.
- Increased Tax Withholding: You may face higher state income tax withholding than necessary.
- Tax Refund Issues: Filing without the MO W-4 may lead to complications and delays in tax refunds.
- Potential Legal Consequences: Not submitting required forms can lead to penalties for both the employee and employer.
How do I know when to use this form?

- 1. New Employment: Required for new employees to establish tax withholding.
- 2. Change in Tax Status: Use the form when there's a change in your marital status or dependents.
- 3. Military Exemption: Submit the form to claim exemption under military regulations.
Frequently Asked Questions
What is the MO W-4 form?
The MO W-4 form is the Employee's Withholding Certificate used by workers in Missouri to determine their state tax withholding.
Who needs to fill out the MO W-4?
All employees in Missouri need to fill out the MO W-4 form to establish their state income tax withholding.
How do I edit the MO W-4 form?
You can edit the MO W-4 form by using our PrintFriendly PDF editor, which allows you to change any text field.
Can I sign the MO W-4 form electronically?
Yes, you can add an electronic signature to your MO W-4 form using PrintFriendly.
What happens if I don't submit this form?
Failing to submit the MO W-4 form may result in incorrect tax withholding, leading to potential tax liabilities.
How do I submit the MO W-4 form?
Submit the completed MO W-4 form to your employer either physically or electronically as directed.
Can I share my edited MO W-4 form?
Yes, PrintFriendly allows you to easily share your edited MO W-4 form via email or other platforms.
Where can I find instructions for filling out the MO W-4?
Instructions for the MO W-4 form are provided within the form itself and can also be found in our editing section.
Is there a deadline for submitting the MO W-4?
Employees should submit their MO W-4 forms within 20 days of being hired.
What information is required on the MO W-4?
You need to provide your name, Social Security number, address, filing status, and any additional withholding details.
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