As a freelancer, you likely enjoy a degree of freedom that makes your traditionally employed friends envious. Nonetheless, that freedom comes with responsibilities in the form of tax burdens, some of which might increase the likelihood of an IRS audit.

Because self-employed people are largely left to fend for themselves when it comes to reporting income and making deductions, the likelihood of miscalculation increases, which might raise an eyebrow or two at the IRS. Some unscrupulous filers even try to file fraudulent returns, which raises the level of scrutiny for all taxpayers.

Because of this, it's important to follow IRS tax rules to the letter when filing as a self-employed individual. Here are seven common tax triggers found in self-employed filings that may result in an IRS audit:

1. Home Office Expenses

Many small-business owners operate from their homes to keep costs down. While there's nothing wrong with listing a home office deduction on your tax return, doing so can raise red flags at the IRS.

To avoid an audit, make sure only to write off the portion of your home used exclusively for work. Additionally, it's important to avoid using a home office space for other purposes, for example, as a second bedroom or as a playroom for the kids. If the space is used for anything other than work at any time, it can't be deducted as a home office.

2. Income Discrepancy

IRS guidelines are complex, and few small-business owners can afford to hire a team of accountants to help navigate them. Unfortunately, making even a small mistake on your tax return can leave you vulnerable to an audit.

Because the IRS receives W-2 and 1099 forms from employers and clients, they're likely to know if you report your figures incorrectly. Be sure to check over all your 1099s to ensure that they match your records. You should also contact your clients to correct any discrepancies.

3. Undocumented Deductions

While you may be tempted to claim more deductions than are feasible to reduce your tax burden, doing so can quickly put you on the IRS's radar. The government is on the lookout for self-employed persons who report large deductions despite earning small incomes.

To reduce your chances of being targeted, take care to report only those deductions you can back up with receipts or other relevant documentation. Some of the biggest red flags for the IRS include expensive meals, non-work-related travel, unusual entertainment, and non-doctor-approved medical expenses.

4. Excessive Donations 

Just as large and undocumented deductions can raise IRS eyebrows, so too can reporting excessive charitable donations. While it's great to give money to your favorite cause, the amounts you are legally able to deduct are subject to income-based limitations, which are in turn contingent on the type of charity you're donating to (a public charity, private charity, or foundation). For best results, ask your donation recipient for a written statement that includes your name and the donation amount.

5. Big Car Costs

Though it's perfectly fine to write off mileage for these trips, self-employed persons can find themselves in trouble for reporting costs not related to business. To protect yourself and your business, keep detailed records of vehicle usage related to your company.

Additionally, you should avoid conducting other errands or making for-pleasure stops while on your way to a business meeting. If the IRS is suspicious of the mileage amounts on your tax return, an audit may be in your future.

Another car-related discrepancy comes from not knowing what you can legally claim. Under current IRS regulations, you can deduct business travel using either the standard mileage rate or the actual expense method (the latter uses a more itemized approach). You can only pick one, however, so choose the one that you can best support with documentation (receipts for gas, oil changes, etc.) so you avoid an audit.

6. Shoddy Math

One of the biggest red flags for the IRS is an abundance of round numbers on your tax return. It's tempting -- and stupid -- to round that $93 medical bill up to an even $100. This seemingly small adjustment can put you on the government's radar. Besides, if you're willing to round up in one area of your return, what's to stop you from doing it in other areas?

For best results, don't do it. Only round up cents (i.e., if you have a bill for $92.37, you should be OK putting down $93), and keep detailed receipts for all your expenses.

7. Higher Income

Earning a higher annual income is the goal of every small-business owner and freelancer. Unfortunately, achieving this goal can also put you at risk of an audit. Not only does earning more make your tax return more complicated, but it also increases the amount the government can reap from an audit, making you more desirable.

While few of us would avoid earning a higher income just to reduce the odds of being audited, it is a good idea to be even more meticulous in your reporting. By staying smart and saving all of your receipts, you can protect yourself and your business moving forward.

There are two big lessons to walk away with here. First, if you're unclear about the rules, go straight to the source and seek the help of an accountant or bookkeeper if necessary. Second, hold on to any and all documentation that you can use to support your deduction and income claims. This will help in the event of an audit.

Keeping track of your transactions can be complicated, but there are software suites that can assist you with organization and preparation. If you need more time, consider filing an extension. It's not worth getting your paperwork in early if you submit incomplete or incorrect information, especially if it leaves you vulnerable to an audit or tax penalty down the line.

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