Forms & instructions | Internal Revenue Service
Form 1040-ES
Estimated Tax for Individuals
Form 1040-ES is used by persons with income not subject to tax withholding to figure and pay estimated tax.
Form 941
Employer's Quarterly Federal Tax Return.
Employers who withhold income taxes, social security tax, or Medicare tax from employee's paychecks or who must pay the employer's portion of social security or Medicare tax.
Related:
Instructions for Form 941 PDF
Form SS-4
Form W-9
Request for Taxpayer Identification Number (TIN) and Certification
Used to request a taxpayer identification number (TIN) for reporting on an information return the amount paid.
Related:
Instructions for Form W-9 PDF
Form W-2
Form W-7
Form 4506-T
Request for Transcript of Tax Return
Use this form to order a transcript or other return information free of charge, or designate a third party to receive the information.
Related:
Form 4506 PDF
Form 2848 PDF
Form 9465
Installment Agreement Request
Use this form to request a monthly installment plan if you cannot pay the full amount you owe shown on your tax return (or on a notice we sent you).
Related:
Instructions for Form 9465 PDF