Tax and Business Services in Union, NJ

Full-Service Tax Preparation and Financial Support — All Year Long

At John O'Shea Tax Preparation and Business Services LLC, we’re more than just a seasonal tax office. We provide comprehensive, year-round services to individuals and small businesses in Union, NJ, and surrounding areas. Whether you need a simple tax return or complete business support, we offer personalized solutions designed to save you time, reduce stress, and keep your finances in order.

As your trusted local tax preparer, we combine professionalism with personalized care — every service, every client, every time.

Man in glasses reviews paperwork with another person at a table, coffee nearby.
Two people working at a desk: one writing on paper, the other using a phone and laptop in a bright office.
Three people in a meeting, examining papers. One man points at a tablet, others look thoughtful.

Our Core Services

Explore the services we offer to help you stay compliant, maximize your returns, and gain financial clarity.

Black icon: calculator, clipboard with percent symbol, and a pen.

Personal Tax Preparation

Whether you're a W-2 employee, freelancer, retiree, or self-employed, our personal tax preparation services are tailored to your life and financial goals. We take the time to uncover all eligible deductions, ensure IRS compliance, and file your return accurately — so you keep more of what you earn.

  • Federal and state income tax filing
  •  Maximized deductions and credits
  • E-filing for faster refunds
  • Tax planning and year-round support
Financial analysis icon. Calculator, bar graph, pencil, and percentage symbol.

Business Tax Preparation

We help small business owners navigate complex tax laws with confidence. Whether you’re an LLC, sole proprietor, or partnership, we’ll prepare and file your returns while offering proactive advice to lower your tax liability.

  • Small business income tax preparation
  • Quarterly estimated taxes
  • 1099 preparation
  • Business expense tracking and deductions
Calculator, document with person icon, and pen.

Bookkeeping Services

Organized books are essential to a healthy business. We offer full-charge bookkeeping services so you can focus on running your business — not reconciling receipts. From expense categorization to monthly reports, we keep your finances accurate and audit-ready.

  • Monthly reconciliation
  • Financial reports & statements
  • QuickBooks support
  • Custom solutions for your business size and industry
Calendar with money, likely representing payment schedule or financial planning.

Payroll Services

Need help managing employee or contractor payments? Our affordable payroll services take the hassle out of payday. We calculate wages, handle tax withholdings, and generate the documents you need for tax season.

  • Payroll processing
  • Tax filings and deposits
  • Year-end W-2s and 1099s
  • Compliance with federal and NJ state laws
Clipboard with percentage symbol and calculator.

IRS Help & Tax Resolution

Received a letter from the IRS? Dealing with back taxes or penalties? We provide expert IRS representation and help you explore the best resolution options — from payment plans to penalty reductions.

  • IRS correspondence review
  • Audit support
  • Back tax filings
  • Tax debt resolution strategies
Clipboard with percentage symbol and calculator.

Year-Round Tax Support

We’re available 24/7 — not just during tax season. Need mid-year planning? Want to make sure you're withholding enough? We offer proactive guidance that helps you stay ahead and avoid surprises.

  • Tax strategy sessions
  • Withholding reviews
  • Retirement tax planning
  • Self-employment tax guidance

Why Work With John O’Shea?

Choosing the right tax preparer makes all the difference. Clients across Union, NJ choose us because:

Black and white award badge with a checkmark.

We’re local

You get direct access to a trusted professional in your community.

Black badge with a checkmark, ribbons at the bottom.

We’re responsive

Need help after hours? We’re available 24/7 by phone or email.

Black award badge with check mark.

We’re experienced

With years of real-world tax and business knowledge, we deliver results — not guesswork.

Black and white award badge with a checkmark.

We’re personal

No call centers. No outsourcing. Just reliable service from someone who knows your name and your needs.

Ready to Simplify Your Tax Life?

Let’s make tax season — and your financial life — easier. Whether you need one-time assistance or ongoing support, we’re here to help you file with confidence and plan for the future.