Tax advisory is what we do best.
Sisu Tax & Consulting works with individuals, business owners, and professional practices across Oregon, Florida, and beyond. Tax planning, IRS representation, bookkeeping, and business advisory, all in one place. Serving clients nationwide from Ormond Beach, FL.
A full range of tax and financial services
Whether you need a single tax return or ongoing financial leadership, we have the experience to handle it.
Tax Plans
Proactive, written tax plans tailored to your entity structure and goals. Year-round advisory, quarterly check-ins, entity analysis, and a strategy meeting before tax season — not after.
Tax Preparation
Individual and business tax returns completed accurately and on time. Personal 1040s, S-Corp 1120-S, partnerships, LLCs, and multi-state filings.
Bookkeeping
Accurate, up-to-date financial records for businesses of all sizes. Monthly reconciliations, payroll support, and year-end preparation.
Comfort Letters
Professional letters confirming self-employment income, business existence, and financial standing for lenders, landlords, and financial institutions.
Fractional CFO
Strategic financial leadership without the full-time cost. Cash flow planning, budget management, and financial reporting for growing businesses.
Forensic Accounting
Financial investigation for disputes, litigation support, fraud detection, and business valuation where the numbers have to be exactly right.
Experience you can count on.
Jason Seibel is an Enrolled Agent licensed to represent taxpayers before the Internal Revenue Service. With more than two decades of experience in tax advisory, bookkeeping, and business consulting, he works with clients who need more than a once-a-year tax preparer.
His practice covers individual and business tax planning, IRS dispute resolution, forensic accounting, and strategic advisory for business owners navigating growth, transitions, or exits. English and Russian speaking.
"Today's tax laws are complicated enough that even a straightforward return can be a problem without the right guidance. There is no substitute for working with an experienced professional."
We know your industry.
Tax and financial strategy looks different depending on how your business works. We bring specific experience to each practice area.
What clients say.
"Jason found deductions my previous accountant missed for three years. The savings more than covered his fee on the first return."
"He handled an IRS audit with no drama and got us a result we could not have managed on our own. Highly recommend."
"As a small business owner, having Jason as our fractional CFO has been one of the best decisions we made. He knows numbers and strategy."
Ready to get your taxes right?
Schedule a free initial consultation and find out what we can do for you.
Contact us.
We respond to all inquiries within one business day. For urgent tax matters, call directly.