What will happen if I overpaid the taxes on the extension form, but failed to file before Oct 15 deadline ?

Do I lose any of the refund ?

  • The IRS doesn't send you money until you file a form explaining why they owe you money.
    – RonJohn
    Oct 7, 2019 at 20:15
  • Will I lose any of the refund ?
    – Nabil Sham
    Oct 7, 2019 at 20:25
  • Will you file your tax return within a reasonable amount of time?
    – RonJohn
    Oct 7, 2019 at 20:28
  • 1
    @RonJohn I think the essence of this question is what constitutes a "reasonable amount of time", the OP seems to assume that is the date of the extension deadline. I seem to recall its actually substantially longer.
    – Vality
    Oct 7, 2019 at 21:14

1 Answer 1


You will not lose any of your refund as long as you file within 3 years of the date that your return is due. From the IRS website:

In most cases, an original return claiming a refund must be filed within three years of its due date for the IRS to issue a refund.

Generally, after the three-year window closes, the IRS can neither send a refund for the specific tax year. nor apply any credits, including overpayments of estimated or withholding taxes, to other tax years that are underpaid.

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