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https://www.investopedia.com/terms/e/eftps.asp
Electronic Federal Tax Payment System (EFTPS), offered by the U.S. Treasury Department, allows tax payments either online or via telephone.
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https://www.eftps.gov/eftps/direct/FAQGeneral.page
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https://www.eftps.gov/eftps/direct/DownloadDocuments.page
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https://www.eftps.gov/eftps/direct/HelpDisclosure.page
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https://www.irs.gov/payments/eftps-the-electronic-federal-tax-payment-system
Use the Electronic Federal Tax Payment System (EFTPS) to pay your taxes. Pay via a secure site or by phone using the EFTPS Voice Response System.
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https://www.eftps.gov/eftps/direct/DownloadSoftware.page
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https://www.eftps.gov/eftps/
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