Tax Services

Tax season should not be the only time you hear from your CPA. At ADC, we take a year-round approach to tax strategy, working with business owners and individuals to reduce liability, stay compliant, and make smarter financial decisions throughout the year.

Our team stays current on federal, state, and local tax law so you do not have to. Whether you are navigating a complex multi-state filing, planning for succession, or simply want confidence that nothing is being missed, we bring the experience and attention to detail that protect your bottom line.

How We Can Help

Business Tax Services

Guiding your company on the best approach to comply with business tax reporting requirements.

We prepare and file federal and state returns for corporations, S-corps, partnerships, and LLCs. Beyond compliance, we look for opportunities to restructure, time income and deductions, and take advantage of credits that reduce your effective tax rate. If your business has grown, added partners, or expanded into new states, your tax strategy should reflect that.

Individual Tax Services

Creating a personalized, custom-fitting tax plan to deliver tax efficiency and maximize after-tax wealth accumulation.

Your personal tax situation is tied to your business, your investments, and your long-term goals. We coordinate individual returns with your business filings to make sure nothing falls through the cracks. From retirement planning to stock option strategies to real estate holdings, we build a plan that fits your full picture.

Estate, Gift & Trust Services

Helping you and your family reach their estate, gift, and trust financial goals while minimizing the tax burden.

Transferring wealth to the next generation takes planning. We work with you and your legal advisors to structure gifts, trusts, and estate plans that preserve assets and minimize transfer taxes. Whether you are setting up a family trust, managing charitable giving, or planning for business succession, we handle the tax side so your intentions are carried out the way you want.

State & Local Tax Services (SALT)

Assessing your company’s federal, state, and local tax reporting requirements.

SALT obligations can be easy to overlook and expensive to get wrong. We review your filing obligations across every jurisdiction where you operate, sell, or have employees. If you have been contacted by a state agency or are unsure whether you are compliant, we can evaluate your exposure and help you get current.

Multi-State Sales Tax & Nexus

Analyzing your income tax nexus for all cities and states your company sells products and services in.

If you sell across state lines, whether through e-commerce, remote employees, or project-based work, you may have nexus in states you have not considered. We map out where your obligations exist, register you where needed, and set up a process so you stay compliant as your business grows.

International Tax Planning & Compliance

Evaluating your business’s international tax demands to shed light on compliance requirements and develop an organized tax planning strategy.

Cross-border transactions introduce reporting requirements that carry serious penalties if missed. We help businesses with foreign operations, overseas suppliers, or international ownership structures stay compliant with FBAR, FATCA, and treaty-based filings while minimizing double taxation.

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Hear From Our Clients

Customers Happy With Our Tax Services

I have been working with Ambrosi Donahue Congdon & Co. P.C. for over 33 years. When we first began our long-term business relationship we were a newly established business just starting out in our successful journey. They have been key members of our team on many levels working with us on; internal controls, financial statement preparation, tax planning, deficiency-free IRS, Sales & Use Tax, and Payroll Tax audits.

Newburyport, MA