Is there anything I should do or apply if I started a job as an individual contributor to a company and they have requested me to fill out a W9 form?

[xmasbaby0]

If you will be an independent contractor then you need to fill out the W-9 so that at tax time a 1099NEC can be issued to you.   When you work as an independent contractor, you are considered to be "self-employed" by the IRS.  That means you will be paying self-employment tax for Social Security and Medicare at tax time as well as ordinary income tax.  What you need to do is plan for that and save for that.    Or make some estimated tax payments during the year, before tax time.

If You have self-employment income for which you will pay self-employment tax for Social Security and Medicare.   You will need to use online Premium software or any version of the CD/download so that you can prepare a Schedule C for your business expenses.

https://ttlc.intuit.com/questions/2926899-how-does-my-side-job-affect-my-taxes

https://ttlc.intuit.com/turbotax-support/en-us/help-article/form-1099-nec/1099-nec/L5qTsBiSe_US_en_U...

https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...

https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922

https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax

https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c

https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct

https://blog.turbotax.intuit.com/self-employed/self-employed-tax-deductions-

calculator-2021-2022-50907/

https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs

https://turbotax.intuit.com/tax-tools/calculators/self-employed/

[VolvoGirl]

When you are self employed you are in business for yourself and the person or company that pays you is your customer or client.

To report your self employment income you will fill out schedule C in your personal 1040 tax return and pay SE self employment Tax.  You will need to use the Online Premium or any Desktop program but the Desktop Home & Business version will have the most help.

Here is some IRS reading material……

IRS information on Self Employment

http://www.irs.gov/Businesses/Small-Businesses-&-Self-Employed/Self-Employed-Individuals-Tax-Center

Pulication 334, Tax Guide for Small Business

http://www.irs.gov/pub/irs-pdf/p334.pdf

Publication 535 Business Expenses

http://www.irs.gov/pub/irs-pdf/p535.pdf

What Self Employed expenses can I deduct?

https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct

You pay Self Employment tax on $400 or more of net profit from self-employment in addition to any regular income tax.  You pay 15.3% SE tax on 92.35% of your Net Profit greater than $400.  The 15.3% self employed SE Tax is to pay both the employer part and employee part of Social Security and Medicare.  So you get social security credit for it when you retire.  

PAYING ESTIMATES

You may need to send in quarterly estimated payments to cover any self employment tax and increase in income.

You must make quarterly estimated tax payments for the current tax year if both of the following apply:

- 1. You expect to owe at least $1,000 in tax for the current tax year, after subtracting your withholding and credits.

- 2. You expect your withholding and credits to be less than the smaller of:

    90% of the tax to be shown on your current year’s tax return, or

  100% of the tax shown on your prior year’s tax return. (Your prior year tax return must cover all 12 months).

[rjs]

Form W-9 is a request for your tax ID number. You might want to get an EIN for your self-employment business and put the EIN on the W-9 instead of your Social Security number, just so that you don't have to give the company your Social Security number.

EIN stands for Employer Identification Number, but you do not have to be an employer to get one. You can apply for an EIN online on the IRS web site and get it right away.