Special Report

19 Mistakes the IRS Says Filers Must Avoid

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19. Failure to make a copy of signed return

It is important to make a copy of signed tax returns as many common types of loans, including mortgages and student loans, require past tax information. If filers are missing copies of previous returns but need one, the IRS can send a copy, the IRS can send you a copy for a $50 fee per tax year.

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18. Failure to double-check routing and account numbers

While this may seem obvious, it is one of the more common mistakes. Banking and routing numbers with errors can make it difficult for the IRS to deposit refunds owed.

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17. Failure to include all necessary information on checks or money orders

If filers owe the IRS money, they must include a payment — check or money order payable to the “United States Treasury” — that includes name, address, social security number, daytime telephone number, tax form, and the tax year on the payment.

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16. Sending in return with inadequate postage

If you are not one of the many Americans who file their taxes electronically, make sure you have the correct postage on the envelope when you send in your taxes. Otherwise, the postal service will return it to you, putting you at risk of missing the April 18 deadline.

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15. Sending your return to the wrong IRS office

There are different IRS office addresses for specific regions and types of tax documents. If you send your return to the wrong IRS office, potentially delaying your refund, you are not alone. Using the wrong address is one of the most common mistakes Americans make each year.