Tax Preparation in Stoneham, Massachusetts
For owners with a business return and a personal return that have to agree, and often a second state in the mix. We prepare business and personal tax returns, Forms 1040, 1065, 1120-S and 1120 among them, with the Massachusetts and other state returns that go with them, for clients here and across the country. Where you authorize it, the return is checked against your IRS transcripts before it is filed, and every return is signed by an Enrolled Agent who can represent you before the IRS if a question comes later.
Who this fits
Most clients arrive with more than one return to file: a business return, a personal return, and often a state return or two. The business return produces the Schedule K-1 or Schedule C figures that flow onto the personal return, so the two have to match, and the business return has to be finished first. When two different people prepare them, small differences turn into a letter from the IRS a year later.
Which form you file depends on how the business is taxed, not on what you call it. An LLC is a legal structure, not a tax form. The same LLC can be taxed as a sole proprietorship, a partnership or an S corporation, depending on elections made when it was formed or later. If that election has never been reviewed, it belongs in the Tax Planning & Advisory conversation rather than in filing season.
- Form 1040 for individuals, including Schedule C for sole proprietors and single-member LLCs and Schedule E for rental property
- Form 1065 for partnerships and multi-member LLCs, with a Schedule K-1 for each partner
- Form 1120-S for S corporations, with a Schedule K-1 for each shareholder
- Form 1120 for C corporations, which pay tax on their own profit
- Massachusetts returns for residents, part-year residents and nonresidents, and other state returns where income or activity creates a filing obligation
- Related federal filings as the file requires. The forms above are the common ones, not the whole list.
How the work runs
We start by looking backward. Send the last filed return for each entity along with this year's documents, through the secure upload link. Prior returns carry the information that still matters, and reading them first is faster than asking about it later.
Questions come in one batch rather than one at a time. A single list is easier to answer than eleven separate emails, and it gets the return finished sooner. If something in the file points to a larger issue, such as payroll that does not match the books or an entity election that no longer fits, we raise it during the review instead of burying it in a footnote.
Before anything is filed, we go through the return with you in plain language: what you owe or are getting back, why it moved from last year, and what to change before the next one. That last part is where most of the value sits, and it is why the Tax Planning & Advisory conversation usually starts at the end of a tax return.
- Documents arrive through the secure upload link
- One consolidated list of what is missing
- Business return first, then the personal returns that depend on it
- A review against IRS transcripts and prior-year figures before filing
- A plain-language walkthrough, then e-file and complete copies for your records
What you get
A filed set of returns that agree with each other and with what the IRS already has on record. Complete copies of every return and schedule, with the carryforward figures noted so next year does not start from scratch.
A written list of what changed from last year and why, and the two or three decisions worth making before the next return. Where the file shows a structural issue, an entity that no longer fits or estimates that never matched reality, you hear about it in the review, not the following spring.
Who leads it
Mike Isaac, EA, leads every engagement and signs every return. He spent four years at one of the country's leading CPA firms preparing and reviewing returns for individuals, pass-through entities, corporations and nonprofits, Forms 1040, 1065, 1120-S, 1120 and 990 among them. The firm does the work to that standard, for clients in Massachusetts and across the country. As an Enrolled Agent he is federally licensed to represent taxpayers before the IRS, so if a notice arrives two years from now, the firm that prepared the return is the one that answers it.
Preparation is the last step of a year, not the only one. Owners who want the bill to be a number they chose move on to Tax Planning & Advisory. Anyone already holding a letter starts with IRS & State Notices.
What getting it wrong costs
The expensive errors on a return are rarely arithmetic. They are the carryforwards nobody brought over: depreciation schedules, prior-year losses, basis in a partnership or S corporation, and elections made years ago that still apply. Preparing a return without them means rebuilding facts that already exist, and usually rebuilding them wrong.
The second class of error is a mismatch. The IRS receives a copy of every W-2, 1099 and K-1 issued to you, and its systems compare them against what you filed. A figure that differs from the agency's record produces an automated notice, typically a year or more after filing. A large share of the letters that end up under IRS & State Notices start as a preparation mismatch that a transcript check would have caught.
Greater Boston adds a third: state borders. People live in Massachusetts and work in New Hampshire, take contracts in Rhode Island, or pick up remote clients anywhere. Any of that can create a return in a second state. Your home state taxes everything and generally gives a credit for tax paid elsewhere, but the credit only comes out right when both returns are prepared together.
What owners ask before this work starts.
Can you prepare both my business return and my personal return?
Yes, and it is usually better that way. The business return produces the Schedule K-1 or Schedule C figures that flow onto your personal return, so the two have to match. Doing them together also means the planning conversation happens once, with the whole picture in front of us instead of half of it.
I live in Massachusetts and work in another state. Which returns do I file?
Massachusetts taxes its residents on income from every source, so your Massachusetts return includes wages you earned across the border. You may also owe a nonresident return in the state where the work was performed. Massachusetts generally allows a credit for tax paid to another jurisdiction, which is designed to keep the same income from being fully taxed twice. Both returns have to be prepared together for that credit to come out right.
What happens if the IRS contacts me after my return is filed?
Bring us the letter. Most notices are routine and get resolved with a written response and supporting documents. Because Mike Isaac is an Enrolled Agent, he can represent you before the IRS directly, including in an audit or a collection matter, rather than handing you off to someone else. There is no scramble to find a person who is allowed to act for you.
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Tax Planning & Advisory
For owners who learn what they owe on the day it is due. A projection built mid-year from your real books, estimates sized to it, and decisions made while the year can still be changed.
