Business Tax Preparation

Business Tax Preparation Done Right the First Time

Getting a business return wrong costs more than money — it costs time, sleep, and trust in the numbers you're running your company on. We prepare corporate, partnership, and S-corp returns for Oregon business owners who want the filing handled correctly, filed on time, and handled by the same team every year.

Oregon Business Returns We Prepare

We handle the full range of business entity returns for closely held companies — from the federal forms to the Oregon-specific filings that often catch owners off guard.

 

For C-corporations, that means the federal Form 1120 and Oregon's Form OR-20. For S-corporations and partnerships, we prepare the federal Form 1120-S or Form 1065 alongside the Oregon Form OR-20-S or OR-65. And for any business that clears Oregon's Commercial Activity Tax threshold, we handle CAT registration and filing as well.

 

Oregon's business tax landscape has more moving parts than most owners realize — the Corporate Activity Tax alone has generated a steady stream of surprise registration letters for businesses that didn't know they qualified. We know these filings well, and we make sure nothing gets missed.

 

  • Federal Form 1120 (C-corporation)
  • Federal Form 1120-S and Oregon Form OR-20-S (S-corporation)
  • Federal Form 1065 and Oregon Form OR-65 (partnership and multi-member LLC)
  • Oregon Form OR-20 (C-corporation Oregon excise or income tax)
  • Oregon Corporate Activity Tax (CAT) registration and filing
  • S-corp and partnership returns handled on our dedicated subpage

The Same Team, Every Year — No Starting Over

One of the most common frustrations we hear from business owners is having to re-explain their company every tax season to a new preparer who doesn't know their history. That doesn't happen here.

 

Bob Russell has been a licensed CPA since 1984 and has run this practice since 1988. Brandon Rodriguez, our staff accountant and CPA candidate, works alongside Bob on business returns. Mary Sebers keeps the office running. It's a small team by design — because small means the people who prepared your return last year are the same people preparing it this year. We already know your entity structure, your industry, your quirks, and your goals.

 

Our office is in Clackamas, and we work with clients in person and remotely across Oregon and Southwest Washington. Either way, the relationship is the same.

What to Expect When You Work With Us

Business tax preparation doesn't have to feel like handing documents into a black box. Here's how the process works.

 

Step 1: Initial Consultation

 

We start with a conversation — in person at our Clackamas office or by video — to understand your business, your entity type, and what the prior year looked like. If you're coming from another preparer, we'll let you know exactly what we need from them.

 

Step 2: Document Gathering

 

We'll give you a clear list of what to pull together: income and expense records, prior-year returns, payroll summaries, asset purchases, and any year-end statements. Most clients send documents through our secure client portal.

 

Step 3: Preparation and Review

 

We prepare the return, review it for accuracy and Oregon-specific compliance, and walk you through anything that needs your attention before you sign. No surprises dropped on you at the last minute.

 

Step 4: Filing and Follow-Through

 

Once you've approved everything, we file. And if a question comes up after the return is submitted — from you or from the IRS or Oregon DOR — we're here.

Tax Preparation and Tax Planning Work Better Together

A business return prepared in isolation tells you what happened. A return prepared by the same firm that planned your year tells you what to do next.

 

When we handle both your tax planning and your business tax preparation, we're not seeing your numbers for the first time in February. We've been tracking your income, your deductions, and your entity structure throughout the year. That continuity means fewer surprises at filing, more opportunities to act on before the year closes, and a return that reflects decisions made intentionally — not just transactions recorded after the fact.

 

If you're currently working with us only on returns and want to talk about year-round planning, we're glad to have that conversation.

Common FAQs

What Business Owners Ask Us About Tax Preparation

  • What's the difference between a C-corp return and an S-corp return?

    A C-corporation files Form 1120 and pays tax at the corporate level. An S-corporation files Form 1120-S, which is an informational return — income and deductions pass through to the owners' personal returns instead. The forms are different, the tax treatment is different, and Oregon has separate state forms for each. We handle both.

  • Do I need to worry about Oregon's Corporate Activity Tax?

    If your business has Oregon commercial activity above $1 million in a calendar year, you're required to register and file for the CAT — even if you don't ultimately owe tax. Many business owners don't find out until they receive a registration notice. We track CAT obligations as part of every business return we prepare.

  • Can you prepare my return if I've been using a different CPA?

    Yes. We'll ask you to provide prior-year returns so we have the history we need, and we'll take it from there. The transition is usually straightforward.

  • Do you handle both the federal and Oregon state return?

    Every business return we prepare includes both the federal return and the applicable Oregon entity return. We don't prepare one without the other — they're part of the same filing, and Oregon has requirements that don't mirror the federal forms exactly.

We’re here to help.