The Ultimate List of Small Business Tax Forms
Starting and operating a small business involves more than tracking revenue and expenses. Depending on your business structure, employees, contractors, retirement plans, and tax obligations, you may need to complete several federal tax forms throughout the year.
These forms help business owners report income, claim eligible deductions, pay employment taxes, provide information to the IRS, and maintain compliance with federal tax requirements. Some forms are filed annually, others quarterly, and certain forms are needed only when a specific event occurs.
This guide organizes common small business tax forms by purpose so you can identify which documents may apply to your business.
Important: Not every business needs every form on this list. Your filing requirements depend on your legal structure, federal tax classification, business activities, and individual circumstances. Businesses with rental income, excise taxes, state tax obligations, or other specialized activities may have additional filing responsibilities.
Tax Forms for Starting a Business
Choosing a business structure and obtaining the necessary tax identification numbers are important early steps. The following forms may be relevant when establishing or changing your business.
Form SS-4: Application for Employer Identification Number
Use Form SS-4 to apply for an Employer Identification Number (EIN). An EIN is a nine-digit federal tax identification number used by many businesses, employers, partnerships, corporations, and other entities.
Sole proprietors may not need an EIN in every situation. However, an EIN is generally required in certain circumstances, including when a business has employees or operates as a partnership or corporation.
An EIN is different from a Social Security number, although both can serve as taxpayer identification numbers for applicable tax purposes.
Form 2553: Election by a Small Business Corporation
Eligible corporations and other qualifying entities can use Form 2553 to elect S corporation tax treatment.
An S corporation generally passes its income, losses, deductions, and credits through to its shareholders for federal income tax purposes. The election has eligibility requirements and filing deadlines. For many calendar-year businesses seeking the election to apply to the current tax year, the deadline is March 15, subject to applicable rules and late-election relief.
Before making this election, consider the potential tax, payroll, and administrative consequences.
Form 8832: Entity Classification Election
Eligible business entities use Form 8832 to elect a federal tax classification different from their default classification.
For example, an eligible LLC may elect to be treated as a corporation for federal tax purposes. Certain eligible entities may also change their classification under the applicable rules.
Form 8832 is not required for every LLC. The appropriate classification depends on the entity's ownership, structure, and existing tax status.
Small Business Employer Tax Forms
Hiring employees or paying independent contractors creates additional documentation and reporting responsibilities. The forms below cover common federal employment and information-reporting requirements.
Form 1099-NEC: Nonemployee Compensation
Businesses generally use Form 1099-NEC to report qualifying payments for services made to nonemployees, such as independent contractors and freelancers.
For payments made in 2026, the general federal reporting threshold for qualifying nonemployee compensation increased to $2,000, subject to applicable exceptions. The threshold was generally $600 for earlier tax years.
Businesses should determine whether payments are reportable based on the recipient, payment type, payment method, and current IRS rules. Collecting Form W-9 from contractors before making payments can help ensure accurate reporting.
Form W-2: Wage and Tax Statement
Employers use Form W-2 to report employee wages and applicable federal income tax, Social Security tax, and Medicare tax withholding.
A copy is provided to each employee, and the employer files the required information with the Social Security Administration. The form helps employees prepare their individual income tax returns.
For wages paid in 2026, employers generally must file Form W-2 when they withheld applicable federal income, Social Security, or Medicare tax, or when wages meet the applicable reporting threshold. The general threshold increased to $2,000 when none of those taxes was withheld, subject to exceptions.
Form W-3: Transmittal of Wage and Tax Statements
Form W-3 summarizes the total information reported on Forms W-2 submitted to the Social Security Administration.
Employers filing paper Forms W-2 generally use Form W-3 as the accompanying transmittal. Electronic submissions have their own filing procedures and generally do not require a separate paper Form W-3.
Form 940: Employer's Annual Federal Unemployment (FUTA) Tax Return
Employers use Form 940 to report their annual Federal Unemployment Tax Act (FUTA) liability.
For most employers, the general FUTA test is met if they paid at least $1,500 in wages during any calendar quarter in the current or preceding year, or had at least one employee working for some part of a day in 20 or more different weeks during the current or preceding year. Separate rules apply to household and agricultural employees.
FUTA tax is an employer expense and should not be deducted from employees' wages.
Form 941: Employer's Quarterly Federal Tax Return
Employers generally use Form 941 to report federal income tax withheld from employee wages and the employer and employee shares of Social Security and Medicare taxes.
The form is normally filed quarterly. Some employers may qualify for a different filing schedule under IRS rules.
Form 944: Employer's Annual Federal Tax Return
Certain small employers may be authorized by the IRS to file Form 944 annually instead of filing Form 941 each quarter.
The form reports federal income tax withheld from wages and applicable Social Security and Medicare taxes. Businesses should not switch to annual filing on their own; they must meet the IRS authorization requirements.
Form 945: Annual Return of Withheld Federal Income Tax
Businesses use Form 945 to report federal income tax withheld from certain nonpayroll payments.
Examples may include backup withholding and withholding from certain retirement distributions. Form 945 is not a general return for all payments made to independent contractors; the reporting requirement depends on the type of payment and withholding involved.
Business Expense and Representation Forms
Small businesses may be eligible to deduct ordinary and necessary business expenses, subject to applicable tax rules. These forms help report certain deductions or authorize representation before the IRS.
Form 4562: Depreciation and Amortization
Use Form 4562 to report depreciation and amortization, as well as certain elections involving business property.
Depending on the circumstances, the form may apply to equipment, furniture, vehicles, and other qualifying assets used in a trade or business. It may also be used to claim applicable deductions under provisions such as Section 179.
The treatment of an asset depends on factors such as its cost, business use, placed-in-service date, and applicable tax rules.
Form 8829: Expenses for Business Use of Your Home
Eligible self-employed taxpayers generally use Form 8829 to calculate qualifying home office expenses under the actual-expense method when claiming the deduction through Schedule C.
The home office generally must meet the applicable exclusive-use and regular-use requirements, subject to specific exceptions. Taxpayers who use the simplified method generally calculate the deduction directly on Schedule C rather than Form 8829.
Form 2848: Power of Attorney and Declaration of Representative
Form 2848 authorizes an eligible representative to act on a taxpayer's behalf before the IRS for specified tax matters.
The form may allow an authorized tax professional or other eligible representative to communicate with the IRS, receive certain tax information, and perform other permitted actions within the authorization's scope.
Signing Form 2848 does not give the representative unlimited authority over every tax matter.
Small Business Income Tax Return Forms
The federal income tax return your business files depends largely on its legal structure and tax classification. Some businesses file separate entity returns, while others report business income on their owners' individual returns.
Form 1065: U.S. Return of Partnership Income
Partnerships generally file Form 1065 to report income, gains, losses, deductions, and credits.
Partnerships are generally pass-through entities for federal income tax purposes. Each partner receives a Schedule K-1 reporting their share of relevant tax items, which must be considered on the partner's own tax return.
The partnership generally does not pay federal income tax on its ordinary income at the entity level, although special taxes and exceptions can apply.
Form 1120-S: U.S. Income Tax Return for an S Corporation
An S corporation generally files Form 1120-S to report its income, deductions, gains, losses, and other tax information.
The corporation generally provides each shareholder with Schedule K-1, which reports the shareholder's share of the corporation's tax items. Shareholders use that information when preparing their individual returns.
S corporations may also have payroll, information-reporting, and other filing responsibilities.
Form 1120: U.S. Corporation Income Tax Return
C corporations generally file Form 1120 to report corporate income, deductions, credits, and federal income tax liability.
Unlike a typical partnership or S corporation, a C corporation generally pays federal income tax at the corporate level. Shareholders may also have tax consequences when they receive dividends or other distributions.
Form 1040-ES: Estimated Tax for Individuals
Self-employed individuals, sole proprietors, partners, and certain S corporation shareholders may use Form 1040-ES to calculate and pay estimated federal income taxes.
Estimated payments may cover income tax on business profits and self-employment tax. Payments are generally made in installments during the year when the taxpayer expects to owe enough tax after withholding and credits.
The required payment amount and due dates depend on the taxpayer's circumstances and applicable IRS rules.
Schedule C (Form 1040): Profit or Loss From Business
Sole proprietors and certain single-member LLC owners generally use Schedule C to report business income and deductible expenses.
The resulting net profit or loss is generally included on the owner's individual income tax return, Form 1040. Depending on the taxpayer's circumstances, net earnings from self-employment may also need to be reported on Schedule SE.
Schedule SE (Form 1040): Self-Employment Tax
Eligible self-employed individuals use Schedule SE to calculate self-employment tax on qualifying net earnings.
Self-employment tax generally covers Social Security and Medicare taxes. It is separate from regular federal income tax, although the calculation and deductions can affect the taxpayer's overall tax liability.
Form 1120-W: Estimated Tax for Corporations
Corporations may use Form 1120-W as a worksheet to estimate their federal income tax liability and determine required estimated tax installments.
Form 1120-W is a calculation worksheet, not a return that corporations generally file with the IRS. Corporations report their annual income tax on the applicable corporate income tax return.
General Tax Forms for Small Business Owners
In addition to regular income and employment tax returns, businesses may need forms for filing extensions, updating information, or addressing estimated-tax penalties.
Form 7004: Application for Automatic Extension of Time to File Certain Business Income Tax Returns
Use Form 7004 to request an automatic extension for certain business tax returns.
The extension generally gives additional time to file the applicable return, not additional time to pay taxes due. Any required payment should generally be made by the original deadline to help avoid interest and potential penalties.
Form 8822-B: Change of Address or Responsible Party — Business
Businesses use Form 8822-B to notify the IRS of certain changes to a business mailing address, business location, or responsible party.
Keeping IRS records current helps ensure that tax notices and other correspondence reach the appropriate recipient. A responsible-party change generally must be reported within the period specified by IRS instructions.
Form 2210: Underpayment of Estimated Tax by Individuals, Estates, and Trusts
Form 2210 helps eligible individuals, estates, and trusts determine whether a penalty applies for underpaying estimated tax and, when necessary, calculate the amount.
Self-employed individuals and business owners who pay estimated taxes may need to review these rules. Not every taxpayer who makes estimated payments must file Form 2210; in some cases, the IRS calculates the penalty.
Form 2220: Underpayment of Estimated Tax by Corporations
Corporations use Form 2220 to determine whether they owe a penalty for underpaying estimated tax and, when required, calculate the penalty.
The form may be relevant to corporations, including S corporations subject to certain special taxes. Whether the form must be attached to a return depends on the applicable instructions and circumstances.
Specialized Tax Forms for Retirement Accounts
Small business owners who establish retirement plans may have additional reporting obligations. The requirements depend on the type of plan, its participants, assets, and transactions.
Form 5500 Series: Annual Return/Report of Employee Benefit Plan
The Form 5500 series is used to satisfy certain annual reporting requirements for employee benefit plans, including many employer-sponsored retirement plans.
Depending on the plan and its circumstances, the applicable filing may be Form 5500, Form 5500-SF, or Form 5500-EZ. These forms report information about a plan's financial condition, investments, operations, or other required details.
Not every plan uses the same form, and some plans qualify for filing exemptions. Form 5500 and related returns generally follow specific electronic filing procedures. <Cite refs={["turn716029search1","turn716029search14"]} />
Form 5329: Additional Taxes on Qualified Plans and Other Tax-Favored Accounts
Use Form 5329 to report and calculate certain additional taxes involving IRAs, qualified retirement plans, health savings accounts, and other tax-favored arrangements.
Whether you need this form depends on the type of account and the transaction involved, such as certain excess contributions or early distributions.
Form 8606: Nondeductible IRAs
Form 8606 is used to report nondeductible contributions to traditional IRAs and certain distributions or conversions involving traditional, SEP, SIMPLE, and Roth IRAs.
The form helps track after-tax IRA basis so that applicable distributions are treated correctly. Small business owners who contribute to retirement accounts should review the reporting requirements that apply to their specific arrangements.
How to Keep Your Small Business Tax Forms Organized
Managing tax forms becomes easier when you maintain a consistent recordkeeping process throughout the year.
Consider these practices:
· Keep financial records current. Organize income, expenses, receipts, invoices, bank statements, and payroll records.
· Collect contractor information early. Request Form W-9 when onboarding vendors and independent contractors.
· Track filing and payment deadlines. Income tax returns, payroll filings, information returns, and estimated payments may follow different schedules.
· Separate business and personal finances. Dedicated business accounts can make it easier to reconcile transactions and substantiate deductions.
· Review your business structure. Changes in ownership, entity classification, or operations may affect which forms you need.
· Use current IRS forms and instructions. Filing requirements and thresholds can change, so check the rules for the tax year involved.
· Protect sensitive tax information. Store taxpayer identification numbers, payroll records, and completed tax forms securely.
Get Help Understanding Your Small Business Tax Obligations
The forms you need depend on how your business is organized, how it earns income, whether it employs workers, and which tax elections or retirement plans apply. Using the correct forms and filing them on time can help you avoid preventable errors and maintain better financial records.
Contnow Tax Preparation LLC can help business owners understand tax preparation requirements, organize relevant records, and identify compliance issues to review with a qualified tax professional.
Before filing, confirm your requirements using the current IRS forms and instructions or consult a qualified tax professional about your particular business situation.
Do you have any other questions? Send us an email at 📧 info@contnowtax.com and we’ll get back to you as soon as possible.
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