Tax Return Preparation & Compliance

Responsive. Reliable. Strategic.

At Langdon & Company LLP, we know tax season doesn’t start in January—and tax strategy doesn’t end with a filing. Whether you’re a closely held business, nonprofit, or high-net-worth individual, our experienced tax professionals help you navigate complex rules, minimize risk, and make informed decisions all year long.

business tax return preparation
logo-kay-yow-15yr
logo-NCMS-Foundation
logo-national-mps-society
logo-BIIS-circle
logo-asnc

What We Offer

Section Overview

What We Offer

Our tax practice provides a comprehensive suite of services, from core compliance to proactive planning. We work closely with clients to understand their goals, operations, and concerns—and we tailor our approach accordingly.

Tax Compliance & Filing

We handle all aspects of tax reporting with accuracy, efficiency, and timeliness.

  • Federal and state income tax returns
  • Multi-state tax filings
  • Business entity filings and elections
  • Nonprofit Form 990 and 990-T preparation
  • Trust, estate, and gift tax returns
  • Quarterly estimated payments
  • Year-end tax packages for owners and shareholders
  • Amended returns and prior year catch-up filings

Tax Planning & Strategy

Tax planning is a year-round conversation. Our team proactively identifies opportunities and risks, helping you plan with confidence.

  • Entity structure and reorganization planning
  • Year-end and mid-year tax projections
  • Transaction and exit planning
  • Retirement and compensation planning
  • Tax implications of grant funding, fundraising, and unrelated business income
  • Planning for changes in ownership or succession
  • Planning for new ventures, locations, or service lines

Advisory & Representation

We stay current with IRS and state-level trends and serve as your advocate when issues arise.

  • IRS and state notice resolution
  • Tax authority correspondence and audit support
  • Strategic consulting for mergers, acquisitions, and dissolutions
  • Support for board-level or investor tax presentations
  • Tax impact analysis for major business decisions

Specialized Knowledge for Special Circumstances

Our team has deep experience supporting:

  • Nonprofits navigating Form 990 disclosures, public support tests, and UBIT, restoring tax-exempt status
  • Multi-state businesses with nexus, sales tax, and payroll compliance challenges
  • Family-owned and closely held entities with unique planning and legacy needs
  • Startups seeking early-stage structure and R&D credit opportunities
  • Organizations recovering from missed filings or regulatory notices

We’ve helped clients with a variety of complicated tax situations, resolve complex IRS notices, and restructure to avoid future risk—all with a practical, approachable style.


Technology-Enabled Efficiency

We make tax season smoother through digital tools and secure workflows. Clients have access to:

  • Secure portals for document sharing
  • Digital e-signature for forms and filings
  • Paperless workflows for faster turnaround
  • Year-round visibility into pending deadlines

Our team integrates with your accounting system and coordinates with your bookkeepers or CFO to reduce back-and-forth and ensure everything is aligned.


Your Tax Team, Year-Round

Working with Langdon & Company means:

  • Access to seasoned tax professionals (not seasonal temps)
  • A dedicated manager or partner who knows your business
  • Proactive outreach to help you avoid surprises
  • Transparent billing and clear timelines

We believe tax should be a strength—not a source of stress.


Let’s Get Ahead of It

Whether you need help with a single return or a full-year strategy, we’re ready to support you.

Why Langdon?

Broad Expertise, Industry Focus

We serve a diverse range of clients—including nonprofits, healthcare providers, and privately held businesses. Our team blends experience and ongoing training to stay ahead of reporting standards, regulations, and industry trends.

Partner Involvement, Start to Finish

Your engagement is led by senior professionals who stay involved—not just during fieldwork, but year-round. We’re hands-on, responsive, and committed to delivering a smooth, efficient process without passing you off to junior staff.

Practical Advice, Real Impact

Our goal is not just to meet requirements but to help you make smarter decisions. We share benchmarking insights, recommend process, and help you prepare for what’s next. From cost reporting to tax strategies, we focus on solving real problems—not selling services.

Submit Resume

Max. file size: 128 MB.