https://www.consumeraffairs.com/finance/how-many-years-can-you-file-back-taxes.html
How Many Years Can You File Back Taxes? (2026)
Usually six years, though you can file older returns
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https://www.nerdwallet.com/taxes/learn/back-taxes-past-due-returns
Back Taxes: How to File Past-Due Returns - NerdWallet
Back taxes refer to unpaid taxes from the current or previous years. The IRS starts charging penalties and interest on late or unpaid taxes the day after the...
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