If you overpay your estimated taxes, you can apply the overpayment as a credit toward your next year's estimated taxes or request a refund when you file your tax return.
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If you overpay your estimated taxes, you can apply the overpayment as a credit toward your next year's estimated taxes or request a refund when you file your tax return.
Check your EIN confirmation letter (CP 575) first. If that is gone, look at a previously filed tax return, a business bank account application, or any 1099 you have issued. Your bank or your payroll provider will also have it on file.