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4 Mistakes to Avoid When Filing Your Last-Minute Tax Returns

The Illinois CPA Society suggests taxpayers mind these common tax-filing mistakes

to dodge issues with the IRS and Illinois Department of Revenue.

With the April 15 tax deadline just a week away, the rush to file your federal

and state tax returns is on, but racing through preparation might inadvertently raise some red flags for

the IRS or Illinois Department of Revenue (IDOR) to inspect. Here are four areas to watch when

preparing and filing your tax returns.

1: Income

Generally, your earned income will be reported to both you and the government on the applicable

forms, like W-2, 1099-B, 1099-DIV, 1099-INT, 1099-K, 1099-MISC, 1099-R, and SSA-1099, among others.

If the income you report on your tax returns doesn’t match all these records, you could find yourself

facing information requests and even fines. Take your time to ensure all your income forms are

accounted for before preparing your tax returns—and confirm the proper totals are entered. Also, be

aware that there’s no form for some taxable income, like proceeds from renting out your vacation

property, meaning you’re responsible for reporting that income on your own.

2: Investments

In most situations, selling an investment is a taxable event in the year of the sale. To determine the tax

consequence, you’ll need to know and report when and what you paid for the investment and when and

what you sold it for. Financial institutions are required to provide this information on Form 1099-B, but

there are several situations where you’re responsible for supplying that information: stocks (including

real estate investment trusts) acquired before Jan. 1, 2011; mutual funds, exchange-traded funds, and

dividend reinvestment plans acquired before Jan. 1, 2012; other specified securities, including most

bonds, derivatives, and options acquired before Jan. 1, 2014; and cryptocurrency transactions. In other

words, keep good records of all investment purchases and sales, and be sure to report not only the

transactions that your financial institution reports on your various 1099 forms, but also the transactions

you’re responsible for independently reporting.

3: Credits and Deductions

The IRS and IDOR scrutinize tax credits and deductions to discourage abuse and unsupported claims.

Consider charitable or other itemized deductions, for instance, which could be a red flag if they’re

especially large, unusual, or lack documentation. It’s important to keep meticulous records that support

any credits and deductions you claim on your tax returns.

4: Incorrect Information

The simplest mistakes create headaches. A misspelled name, an incorrect Social Security or tax ID

number, forgetting to update direct deposit information, or a missing signature can all cause problems

or delays in processing your tax returns. In other words, review all the fields throughout your returns for

accuracy—and keep in mind that even tax preparation software doesn’t always catch every mistake.

The final rush to file federal and state tax returns is always a hectic process. Be aware that requesting a

filing extension will give you until Oct. 15, 2024, to file your returns. However, if taxes are likely to be

owed, it’s still your obligation to pay those taxes by this year’s April 15, 2024, filing deadline.

If in doubt, the Illinois CPA Society reminds taxpayers that CPAs, certified public accountants, are ready

to help. CPAs are strategically positioned to prepare and file your tax returns and help manage your

taxes and personal finances all year long. The Illinois CPA Society’s free “Find a CPA” directory can help

you find the trusted, strategic advisor that’s right for you based on location, types of services needed,

and languages spoken. Find your CPA at

About the Illinois CPA Society

Founded in 1903, the Illinois CPA Society, with more than 21,700 members, is one of the largest state

CPA societies in the nation. Its mission is dedicated to enhancing the value of the CPA profession

through the strategic initiatives of advocacy, information, education, and connections. Visit

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