A Tax Number

I remember the first time I tried to file my taxes as a gig worker. I had a few side gigs — driving for rideshare, freelancing on a couple of platforms, and doing odd jobs through a local app. I assumed that filling out a tax return would be straightforward, but I was wrong. I didn’t realize that the IRS needed specific numbers from each of these sources, and I had no idea where to find them. That’s when I learned the importance of 'a tax number' — a term that might sound simple, but it actually holds the key to your financial well-being.^[1]

Finding a tax number wasn’t just about filling in a blank on a form. It was about understanding exactly what each number represented, how it affected my deductions, and how it could save me money in the long run. I spent days poring over receipts, invoices, and statements, and I even had to contact a few companies to clarify what they meant by certain numbers. It was frustrating, but it was also eye-opening. I realized that knowing the right 'a tax number' could mean the difference between owing a bunch of money and getting a nice refund.^[2]

Today, I'm much more confident with taxes. I owe it to the hard work I put into understanding 'a tax number' — and how it affects everything from my deductions to my overall financial health. I've learned that these numbers are not just abstract concepts. They're concrete, real, and they can shape your life in ways you might not even realize. That’s why, if you're a gig worker, understanding 'a tax number' is the first step toward taking control of your finances.

What Exactly Is a Tax Number?

As of September 2026, a tax number, also known as a Taxpayer Identification Number (TIN), is a unique code assigned to you by the IRS. It's used to report your income to the government and is essential for claiming deductions. Whether you're a sole proprietor or part of a larger business, having the correct TIN ensures that your tax returns are accurate and that you're not missing out on any eligible deductions.

There are different types of tax numbers, such as the Employer Identification Number (EIN) and the Social Security Number (SSN). Depending on your business structure, you might need one or the other. For example, if you're running a sole proprietorship, you can use your SSN as your TIN, but if you're forming an LLC, you might need an EIN.

I once tried to use my SSN on a platform that required an EIN, and I was immediately flagged. It took me a week to get the right number and submit the necessary documentation. That experience taught me the importance of knowing which tax number to use in different situations.

Part of our Tax forms guide.

Where to Find Your Tax Number

Your tax number is typically found on your W-2 form, 1099-MISC, or 1099-NEC. These forms are sent to you by your employer or the platforms where you earn income. If you're self-employed, you'll receive a 1099 form each year that includes your tax number. (1098, federalregister.gov)^[3]

If you're unsure where your tax number is, you can check your tax filings from previous years or contact the IRS directly. They have a tool on their website that allows you to look up your TIN. I used this tool once after losing my 1099 form, and it was a lifesaver.^[4]

I’ve also heard from other gig workers who keep a physical copy of their tax number in a safe place, like a notebook or a folder. It’s a small but effective way to stay organized and avoid the stress of looking for it when tax season rolls around.

Your tax number is your financial fingerprint — keep it safe and use it wisely.

Related: At a tax services

Related: Tax And Identification Number

How to Use Your Tax Number for Deductions

Your tax number helps the IRS track your income and expenses, which is essential for claiming deductions. For example, if you use your car for gig work, you can deduct the portion of your car expenses that relates to your business. Your tax number is used to verify that you're reporting these expenses accurately.

I once forgot to include my tax number on a form for a business expense, and I had to resubmit everything. It was a simple mistake, but it cost me time and caused unnecessary confusion. After that, I made sure to double-check that all my forms included the correct tax number.

Using your tax number for deductions also helps you avoid penalties. The IRS can flag discrepancies in your filings, and having the right number on file ensures that everything is in order. It's a small detail, but it can make a big difference in the long run.

“I remember the first time I tried to file my taxes as a gig worker.”— Tax Deductions for Gig Workers editors

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Common Misconceptions About Tax Numbers

One of the biggest misconceptions is that your tax number is only used for income reporting. In reality, it's also used for tracking deductions and credits. For example, if you claim the home office deduction, your tax number helps the IRS verify that you're using the space for business purposes.

Another common misconception is that you can use any tax number for any purpose. This is not true. Each type of tax number is used for specific purposes. Using the wrong number can result in your tax return being rejected.

I once tried using my EIN for a platform that required an SSN, and my application was denied. It took me several days to figure out what the issue was. Since then, I’ve made it a point to verify which tax number is required for each platform or financial institution.

Related: A and a tax service

Tracking Income and Expenses with Your Tax Number

When you have multiple sources of income, your tax number helps you organize and report everything correctly. It ensures that all your income is accounted for and that you're not missing any deductions.

I keep a spreadsheet where I track my income and expenses, and I include my tax number in each entry. This helps me stay organized and makes it easier to file my taxes at the end of the year.

Using your tax number to track your income and expenses also helps you avoid double-counting or missing out on deductions. It's a simple but effective way to stay on top of your finances.

Related: How to tax a service

How a Tax Number Affects Your Refund

By using your tax number correctly, you ensure that all your income and deductions are accounted for. This helps you claim the maximum refund possible and avoid owing money to the IRS.

I had a year where I didn't include my tax number on a form, and I ended up owing a significant amount in taxes. It was a costly mistake, and it taught me the importance of using the right number in every step of the process.

Having the correct tax number also helps you avoid penalties and interest charges. If you're missing numbers on your return, the IRS can flag your filing and delay your refund. It's a small detail, but it can have a big impact on your finances.

Your tax number can be the difference between a refund and a tax bill — use it wisely.

Related: The best tax software for tax professionals

The Long-Term Benefits of Knowing Your Tax Number

Knowing your tax number helps you track your income and deductions over time, which can be useful for planning your taxes in the future. It also helps you stay compliant with the IRS and avoid any penalties.

I’ve noticed that gig workers who keep track of their tax numbers tend to have a better understanding of their finances. They’re more prepared for tax season and less likely to make mistakes on their returns.

In the long run, having the right tax number can save you money and reduce stress. It's a small step, but it can make a big difference in your financial health.

A Tax Number