IRS Filing Support & Tax Compliance
Expert support for all your federal tax filing needs. From business returns to information returns, extensions to IRS notices—we ensure accurate, timely compliance with IRS requirements.
Trusted by high-growth startups
Why IRS Filing Support Matters
IRS filing requirements are complex and constantly changing. Missing deadlines, filing incorrectly, or responding inadequately to IRS notices can result in substantial penalties, interest, and increased audit scrutiny.
Business Tax Returns
We prepare and file federal business tax returns including Form 1120 (C-Corps), Form 1120-S (S-Corps), Form 1065 (Partnerships), and Schedule C (Sole Proprietors). We ensure accurate income reporting, proper deductions, and compliance with all IRS regulations.
Information Returns
We handle all information return filings including Forms W-2 (employee wages), 1099-MISC and 1099-NEC (contractor payments), 1099-K (payment card transactions), Form 3921 (ISO exercises), and other required IRS reporting. We ensure timely filing and recipient copies.
IRS Correspondence & Notices
We respond to IRS notices, letters, and information requests on your behalf. Our team analyzes each notice, determines the appropriate response, gathers required documentation, and communicates with the IRS to resolve issues efficiently.
How It Works
Gather Required Tax Information
Collect all financial documents and information needed for accurate IRS filing.
- Income statements: Sales, service revenue, other income
- Expense records: Categorized business expenses with receipts
- Balance sheet: Assets, liabilities, equity accounts
- Payroll reports: Wages, withholding, benefits, taxes
- Contractor payments: 1099 reporting information
- Bank and investment statements for interest and dividends
- Prior year tax returns for consistency and carryforwards
Prepare Accurate Tax Returns
Complete federal tax returns using proper forms, schedules, and reporting methods for your entity type.
- Select correct business tax form (1120, 1120-S, 1065, Schedule C)
- Report all income from operations and investments
- Calculate and document all allowable deductions
- Apply proper depreciation methods for fixed assets
- Complete required schedules (M-1, M-3, K-1s, etc.)
- Calculate tax liability using current rates and credits
- Review return for accuracy and IRS compliance
File Information Returns
Prepare and file all required information returns reporting payments to employees, contractors, and others.
- Form W-2: Employee wages and withholding (due Jan 31)
- Form 1099-NEC: Non-employee compensation (due Jan 31)
- Form 1099-MISC: Rents, royalties, other payments (due Jan 31)
- Form 1099-K: Payment card transactions (due Jan 31)
- Form 3921: ISO exercises (due Jan 31 to employees, Mar 31 to IRS)
- Furnish recipient copies by required deadlines
- File with IRS electronically if required (10+ forms)
Submit Returns and Payments by Deadlines
File all tax returns and information returns by IRS deadlines, paying any taxes owed or requesting extensions.
- Business tax return deadlines: March 15 (S-Corps/Partnerships), April 15 (C-Corps/Sole Proprietors)
- Extension deadlines: September 15 or October 15 (requires filing Form 7004 or 4868)
- Estimated tax payment deadlines: Quarterly (April, June, Sept, Jan)
- Information return deadlines: January 31 (most forms)
- Pay taxes electronically via EFTPS or credit card
- Obtain confirmation of filing and payment for records
Respond to IRS Correspondence
Monitor for IRS notices and respond promptly with accurate information and documentation.
- Review all IRS notices immediately upon receipt
- Identify the issue: payment due, information request, audit notice, etc.
- Gather supporting documentation requested
- Prepare written response addressing all IRS questions
- Submit response by deadline stated in notice (typically 30 days)
- Follow up to confirm IRS received response and issue is resolved
- Maintain copies of all correspondence for records
Key Deadlines
Information Returns & Recipient Copies
Forms W-2, 1099-NEC, 1099-MISC, 1099-K, and Form 3921 must be furnished to recipients by January 31. This deadline also applies to filing W-2s with SSA.
Applies to: All businesses with employees or contractors
S-Corp & Partnership Returns
Form 1120-S (S-Corp) and Form 1065 (Partnership) returns are due March 15 for calendar year entities. Extensions available to September 15 via Form 7004.
Applies to: S-Corporations and Partnerships
Electronic Filing of Information Returns
Electronic filing deadline for Forms 1099, 3921, 3922, and other information returns. Paper filing deadline is earlier (varies by form).
Applies to: Businesses filing 10+ information returns electronically
C-Corp & Individual Returns
Form 1120 (C-Corp) and Form 1040 (Individual) returns due April 15. Extensions available to October 15 via Form 7004 or Form 4868. Q1 estimated tax payment also due.
Applies to: C-Corporations, Sole Proprietors, Individuals
Estimated Tax Payments
Quarterly estimated tax payments due April 15, June 15, September 15, and January 15 (of following year) for businesses and individuals with tax liability.
Applies to: All entities with estimated tax requirements
Common Mistakes to Avoid
Misclassifying Workers (Employee vs. Contractor)
Treating employees as contractors avoids payroll taxes but triggers IRS reclassification, back taxes, penalties (up to 100% of FICA owed), and interest
Apply the IRS common-law test and behavioral/financial control factors. When in doubt, classify workers as employees. Use Form SS-8 to request IRS determination before classification.
Missing Information Return Deadlines
Late Forms W-2 or 1099 result in penalties starting at $60 per form (up to $310 per form for intentional disregard), plus potential backup withholding requirements
Prepare information returns in early January. File electronically if possible (faster, more reliable). Set reminders for January 31 deadline. Request TCC for electronic filing at least 45 days early.
Not Responding to IRS Notices
Ignoring IRS notices leads to default assessments, additional penalties, collection actions (levies, liens), and loss of appeal rights
Open and review all IRS mail immediately. Respond by the deadline stated (typically 30 days). If you disagree with a notice, file a timely appeal. Seek professional help for complex notices.
Incorrectly Calculating Business Deductions
Overstating deductions triggers audits and results in tax deficiencies, penalties (20% accuracy-related penalty), and interest on unpaid amounts
Maintain detailed records and receipts for all deductions. Follow IRS guidelines for common deductions (meals at 50%, home office requirements, vehicle mileage). Document business purpose.
Filing Paper When Electronic Filing is Required
Paper filing when required to e-file results in rejection, late filing penalties, and need to refile electronically, often missing deadlines
If you file 10 or more information returns, you must e-file. Obtain TCC from IRS for electronic filing. Use IRIS system for information returns or approved third-party software.
Not Making Quarterly Estimated Tax Payments
Underpayment of estimated taxes results in penalties calculated quarterly, even if you pay the full balance due by the annual filing deadline
Calculate estimated tax based on current year income or 100% of prior year tax (110% if AGI over $150K). Make quarterly payments even if amounts change—you can adjust each quarter.
How Finvisor Helps
We manage all aspects of your IRS filing obligations, from business returns to information returns to correspondence management.
Business Tax Return Preparation
We prepare and file accurate federal business tax returns for all entity types (C-Corp, S-Corp, Partnership, Sole Proprietor), ensuring proper income reporting and deductions.
Information Return Filing
We handle all information return requirements including Forms W-2, 1099-NEC, 1099-MISC, 1099-K, and Form 3921, filing electronically when required and furnishing recipient copies on time.
IRS Correspondence Management
We monitor for IRS notices, analyze each correspondence, gather required documentation, and respond on your behalf to resolve issues efficiently and protect your interests.
Frequently Asked Questions
What IRS filings do businesses need to complete annually?
Businesses typically need to file: (1) Annual business tax return (Form 1120, 1120-S, 1065, or Schedule C) reporting income and expenses, (2) Information returns including Forms W-2 for employees and Forms 1099 for contractors and vendors, (3) Employment tax returns (Forms 941 quarterly and 940 annually) if you have employees, and (4) Quarterly estimated tax payments if the business has tax liability. Specific requirements vary by business structure and activities.
When are business tax returns due to the IRS?
Deadlines vary by entity type: (1) S-Corporations and Partnerships: March 15 for calendar year entities, (2) C-Corporations: April 15 for calendar year entities, (3) Sole Proprietors: April 15 (filed with personal return on Schedule C). Extensions are available: S-Corps/Partnerships can extend to September 15 via Form 7004, and C-Corps/Individuals can extend to October 15. Note that extensions are for filing, not payment—estimated tax is still due by the original deadline.
What information returns must I file and when?
Common information returns include: (1) Form W-2 for employee wages (due to employees and SSA by January 31), (2) Form 1099-NEC for contractor payments over $600 (due January 31), (3) Form 1099-MISC for rent, royalties, and other payments (due January 31), (4) Form 1099-K for payment card transactions meeting thresholds (due January 31), and (5) Form 3921 for ISO exercises (due to employees by January 31, IRS by March 31 if e-filing). Electronic filing is required if you have 10 or more returns.
What should I do if I receive an IRS notice or letter?
Take these steps immediately: (1) Read the notice carefully and note the deadline for response (typically 30 days), (2) Identify the issue: payment due, information request, proposed changes, audit notice, etc., (3) Gather supporting documentation referenced in the notice, (4) If you agree with the notice, pay the amount due or provide requested information. If you disagree, prepare a written response explaining why and provide supporting evidence, (5) Send your response by the deadline via certified mail, return receipt requested, (6) Keep copies of all correspondence. Seek professional help for complex notices or if you're unsure how to respond.
Do I need to make quarterly estimated tax payments?
Yes, if you expect to owe more than $1,000 in tax when you file your return (after withholding and credits). Estimated tax payments are due quarterly: April 15, June 15, September 15, and January 15 of the following year. Calculate payments based on either 100% of prior year's tax (110% if AGI over $150K) or 90% of current year's expected tax. Corporations have different thresholds and must make estimated payments if they expect to owe $500 or more.
What happens if I miss an IRS filing deadline?
Consequences depend on the type of filing: (1) Business tax returns: Late filing penalty of 5% per month (up to 25%) of unpaid tax, plus late payment penalty of 0.5% per month. Minimum penalty of $435 for returns over 60 days late. (2) Information returns (W-2, 1099): Penalties from $60-$310 per form depending on how late filed. (3) Employment taxes: Penalties range from 2-15% depending on lateness. File and pay as soon as possible to minimize penalties. You may qualify for penalty relief if you have reasonable cause.
How can Finvisor help with IRS filing and compliance?
We provide comprehensive IRS filing support including: (1) Preparing and filing business tax returns (Forms 1120, 1120-S, 1065, Schedule C), (2) Managing information return filings (W-2, 1099, 3921, etc.) including electronic filing when required, (3) Calculating and processing quarterly estimated tax payments, (4) Requesting extensions when needed, (5) Responding to IRS notices and correspondence on your behalf, and (6) Maintaining organized records and documentation. We ensure timely, accurate filing to minimize penalties and audit risk.
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