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About Denilass Business & Tax Services

Denilass Business & Tax Services specializes in accounting and tax preparation services for a wide variety of clients. Our primary focus is:

  • Tax return filing and tax planning for individuals
  • Bookkeeping and payroll for individuals and small businesses
  • Corporate tax return filing

Constant participation in Continuing Professional Education courses offered by local chapters of national accounting and tax associations keeps our firm on the "leading edge" of ever-changing tax laws and accounting methods.

Computerized offices and internet access ensures clients accurate, efficient, state-of-the-art service at a competitve price.

Visit the "Services" area of our site to learn more about the many accounting and tax services available to individuals and businesses.

Visit the "Contact Us" page for information regarding how to reach us via telephone, fax, e-mail or mail.

Feel free to contact the office anytime. We're here to help.


preview Team Members section anchor

Kari Denison Lasswell


Kari is a third generation Oregonian and currently resides with her husband and, her two most impressive accomplishments, daughter Cassandra 24 and son James (JD) 17, in Corvallis, Oregon.

In years past Kari has had her own technology consulting business and has worked closely with various small businesses and non-profits including Oregon Tree Farm System, Oregon Small Woodlands Association and various political lobbying groups.

After spending many years commuting to either Salem or Eugene, Kari decided to try a career change that would allow her to spend more time at home with her children.  In 2002 she became a Licensed Tax Preparer and started her tax preparation career working for her mother-in-law in Corvallis, Oregon.

In 2004, Kari went to work for Debra McKinney at McKinney Tax Service and passed her Consultant’s exam in the fall of 2006.  In 2007 she purchased McKinney’s Lebanon branch office and ventured out on her own by opening Denilass Business & Tax Services, located in Lebanon, Oregon. In 2010 she became an Enrolled Agent with the Internal Revenue Service and has nearly doubled her practice to over 700 clients. 

Kari has been very active in Oregon Association of Tax Consultants, as past president of the Mid-Willamette chapter (2010 - 2012), State Education Co-Chair (2012 - Present), 2013 Convention Chair and was the recent recipient of the 2014 President’s Award.  She has also been very active with the Oregon Board of Tax Practitioners by participating in, their Exam & Education Committee, Rules Advisory Committee, and Consultant/Preparer Item-Writing Committee.  She has also been a state proctor for the state exam on multiple occasions.   

Taxes are not everything though and if there is any spare time left she stays active within her local community and her family.

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