Individuals who expect to owe a certain amount of tax and don't have it withheld through their paychecks or other sources are generally required to file Form 1040-ES.
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Individuals who expect to owe a certain amount of tax and don't have it withheld through their paychecks or other sources are generally required to file Form 1040-ES.
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.