Business Tax Filing

Expert Tax Support for Maryland Business Owners

At National Income Tax Service Inc., we provide reliable, accurate, and fully compliant business tax filing services for companies across Upper Marlboro, MD and surrounding areas. From startups and sole proprietors to S Corporations and partnerships, we help you meet your IRS and state filing obligations while maximizing every allowable deduction.



Tax compliance is critical for your business—mistakes can lead to penalties, delays, and lost revenue. We bring years of experience and a commitment to personalized service to ensure your returns are handled with precision and care.

What to Expect When You Work With Us

We simplify the process of business tax filing so you can focus on running your company. When you work with National Income Tax Service Inc., you’ll receive:


  • A personalized consultation to understand your business structure
  • A secure document checklist based on your entity and industry
  • Transparent, flat-rate pricing with no surprise fees
  • Fast turnaround times without sacrificing accuracy
  • Proactive communication throughout the entire process


If your business needs help with books, forms, or organizing financials before tax prep, we’re here to guide you—not judge you.

Who We Serve

We work with a wide range of business entities and industries, including:


  • Sole proprietors
  • Partnerships and multi-member LLCs
  • S Corporations and C Corporations
  • Independent contractors and 1099 earners
  • Service providers, consultants, trades, and retail businesses
  • New and growing businesses looking for year-round tax guidance


Whether you're filing for your first year in business or preparing multi-year returns, we deliver professional support tailored to your structure, revenue model, and compliance needs.

LLC, S Corporation, and Partnership Filings

Different entities require different tax strategies. We’re experienced in handling all major business types and structures, including:

LLCs (Single-Member and Multi-Member):

We help with Schedule C filing for single-member LLCs and Form 1065 with K-1s for multi-member LLCs.

S Corporations:

Our team prepares Form 1120S and ensures all shareholder income and losses are correctly allocated and reported.

Partnerships:

We manage all aspects of partnership filings, including distribution tracking, capital accounts, and K-1 generation.

C Corporations:

For C Corps, we prepare and file Form 1120, track deductions and credits, and help maintain full compliance with federal and state rules.

Year-Round Tax Planning and Strategy

Smart business tax filing doesn’t just happen in April. Our clients benefit from ongoing planning and strategy that helps reduce liability, prepare for changes, and take advantage of new tax code opportunities.


We offer:


  • Entity structure analysis (LLC vs. S Corp vs. C Corp)
  • Quarterly estimated tax planning
  • Deduction and expense reviews
  • Capital gains and loss harvesting
  • Retirement and payroll tax optimization
  • Industry-specific compliance alerts


Proactive planning helps your business stay compliant, competitive, and prepared—no matter what the year brings.

Why Choose National Income Tax Service

Our firm is known for accuracy, professionalism, and local expertise. We’re committed to helping Maryland businesses thrive by delivering tax solutions that are tailored, compliant, and stress-free.


What makes us different:


  • Deep knowledge of Maryland tax regulations
  • Support for both simple and complex business filings
  • Fast response times and personalized service
  • Local focus and long-term relationships with our clients
  • Options for in-person or secure virtual filing


We understand the challenges small businesses face—and we’re here to be your trusted tax partner year after year.

IRS Help for Businesses

If your business is behind on taxes or facing issues with the IRS, we offer practical, experienced help with:



  • Responding to IRS letters and notices
  • Resolving tax debt or setting up payment plans
  • Penalty abatement requests
  • Filing delinquent business returns
  • Preparing documentation for audits
  • Representation during IRS inquiries or reviews


We’ll help you resolve problems efficiently while protecting your business interests.

Schedule Your Business Tax Consultation

Don’t wait until the last minute to file your business taxes. Schedule your consultation today and get the support you need from a trusted tax professional in Upper Marlboro.