Our Team

About Us

"Since 1986, our family-owned tax office has specialized in accounting, bookkeeping, tax preparation, and planning for the greater Phoenix area. We’re passionate about helping individuals and small businesses grow and thrive. With over 30 years of experience, we simplify complex financial issues and guide our clients to sound decisions with confidence. Committed to the highest ethical standards, our success is built on a client-first approach, delivered by our team of dedicated professionals."

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Karen Lynn, AFSP
President

Providing Accounting and Tax Services for over 30 years, Karen specializes in QuickBooks and is a registered QuickBooks Pro Advisor. As the valued leader of our team, Karen brings a level of expertise and dedication that enhances our client relationships and takes them to new levels of business success and individual tax guidance!

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Leslie Olness, CPA
Tax Preparer, Accountant

Hi, I’m Leslie! I joined The Tax Office in January 2021, bringing with me over 25 years of experience in the public accounting industry. Over the years, I’ve worked in both small CPA offices and large regional CPA firms, which has allowed me to gain a deep understanding of the field. I’ve been a licensed CPA since 1999, and helping clients navigate the complexities of taxes and accounting has always been my passion.

I specialize in business and individual tax preparation and planning, as well as providing accounting services for small to mid-size businesses. I’m dedicated to staying up-to-date on the ever-changing tax laws, ensuring that I can provide the best possible advice to my clients. Tailoring my services to meet their unique goals is what I strive to do every day.

Outside of work, I’m blessed with a loving and supportive husband, and together we have two incredible daughters. One is excelling in nursing school, and the other is a collegiate soccer standout—we couldn’t be more proud of them. I love reading novels, staying active with Pilates, and traveling annually with friends and family. Some of my favorite pastimes include playing Bunco with my besties, savoring my daily morning coffee, and enjoying the little moments that bring happiness to life. Being part of The Tax Office team has been such a rewarding experience, and I look forward to continuing to serve our community with my expertise and commitment.

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Donna Stanley, BSA, MBA
Tax Preparer, Accountant

Donna has a BS in Accounting from the University of Phoenix and MBA in Accounting from Grand Canyon University.  She has been working in the accounting industry since 1985 and preparing taxes since 2008. Donna's knowledge, education and experience makes her a valued member of our great team!

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Ashley Mendoza, BSA, MBA, AFSP
Office Manager, Head Accountant

Hi there! I’m Ashley Mendoza, but you might remember me as Ashley Bates. As the Office Manager and Head Accountant at The Tax Office, I bring over a decade of experience in tax and accounting. My roots run deep here, having grown up in the Arizona desert and being part of The Tax Office legacy since childhood. As Jim Bates’ granddaughter, and Karen (Bates) Lynn’s daughter, I’ve had the privilege of seeing this firm grow and evolve, and it’s been a joy to contribute to its success.

I earned my Bachelor’s in Accounting from the University of Alaska Anchorage while competing as a collegiate volleyball player on a full-ride scholarship. Later, I pursued my Master’s in Accounting at Grand Canyon University. Over the years, I’ve handled everything from financial statements and payroll to sales tax returns and individual income taxes.

After spending 12 adventurous years in Alaska, I returned to Arizona in 2023 and rejoined The Tax Office in 2024. It’s been wonderful reconnecting with long-time clients and meeting new ones, continuing the tradition of personalized and effective service.

When I’m not immersed in numbers, I lead an active life with my husband and teenage stepson, who’s making waves in the swimming world! Our chihuahua, Maggie, keeps us all on our toes and is always by my side. Staying active and healthy is a big part of my life, balancing my dedication to both personal well-being and professional growth.

Bryan Smith, AFSP
Accountant, Tax Preparer

Hi, I’m Bryan! Born and raised in the Arizona desert, I’ve always had a knack for numbers and problem-solving. I’ve worked in the tax and accounting field for over 10 years and joined The Tax Office in 2023. I first got to know Karen through my uncle, who I also worked with in the tax industry, which eventually led me to join The Tax Office. I enjoy the challenge of working with numbers—solving puzzles, uncovering solutions, and helping clients make sense of their finances. At The Tax Office, I handle accounting, payroll, quarterlies, sales tax, and year-end processes, ensuring every detail is managed efficiently. Numbers never lie, and I’ve built my career on using numbers to create clarity and provide meaningful solutions for clients.

Outside of work, I’m a proud hobby gamer and occasionally participate in small gaming tournaments. When the Arizona weather is nice, you can find me outdoors—walking while playing Pokémon Go, riding my bike, or hiking with friends when our schedules align. These activities keep me balanced and give me a chance to recharge.

Being part of The Tax Office team has been a rewarding experience, and I’m excited to continue helping clients navigate the complexities of taxes with accuracy and care.

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Daneen O’Brien
Administrator

Hi, I’m Daneen, but most people know me as “Day.” I hold an Associate of Arts in Healthcare Administration from the University of Phoenix and bring over 10 years of customer service experience to The Tax Office. My diverse background, which includes a prior work history with the U.S. Armed Forces, has equipped me with a robust and versatile skill set. From handling complex tasks to providing exceptional service, I approach every responsibility with precision and professionalism.

Integrity, aptitude, and tenacity are at the core of who I am, and I strive to bring those qualities to everything I do. As a first-generation college graduate, I’ve worked hard to combine my small-town charm and kindness with global experiences to offer a unique perspective in my work.

I pride myself on being detail-oriented, well-organized, and a natural troubleshooter. Known for my strong communication skills and ability to coordinate effectively, I’m passionate about understanding and meeting the needs of clients, ensuring they feel supported every step of the way.
When I’m not at work, I love spending quality time with my husband and two children and serving in my local church. I'm happiest outdoors, enjoying activities like hunting, fishing, and hiking; I also have an uncanny love for cleaning and enjoy "hands-on" tasks.

I’m thrilled to be part of The Tax Office team and look forward to continuing to make a positive impact both in and out of the office.
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Jade Mandap
Administrator

Hi, I’m Jade! I joined The Tax Office Inc. in November 2022, and it’s been an incredible experience being part of such a supportive and hardworking team. I’m currently a college student pursuing a Bachelor’s Degree in Accounting, with graduation set for May 2025. After that, I plan to continue my education and earn a Master’s Degree starting in the fall of 2025. My ultimate goal is to obtain my CPA license and build a rewarding career in the accounting industry.

I’ve always been passionate about accounting, especially the fast-paced and dynamic energy of tax season. I find so much satisfaction in working closely with clients and their families, building strong relationships while helping them during such an important time. Every day at The Tax Office is an opportunity to learn, grow, and make a meaningful impact.

When I’m not at work or hitting the books, I love staying active at the gym and traveling to explore new places. Relaxing at the beach is one of my favorite ways to recharge, and I’m always on the lookout for my next adventure.

I’m excited to continue growing in this field and to help clients navigate the complexities of taxes with care and precision!

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Maya Beganovic
Administrator

Hi, I’m Maya! I joined The Tax Office Inc in January 2025, and I couldn’t be more excited to be part of this amazing team. I’m currently in my final semester as a senior at Arizona State University, where I’m pursuing my Bachelor’s in Accounting. Tax Accounting has been my favorite class so far, and it’s inspired me to build a future career in the field.

I’m passionate about continuing my education and plan to pursue my Master’s in Accountancy and Data Analytics at ASU after graduation. My ultimate goal is to earn my CPA license and take my career in tax to the next level.

When I’m not working or studying, you can usually find me staying active. I love going to the gym, attending pilates classes, and exploring Arizona’s beautiful hiking trails. Staying active and connecting with nature helps me recharge and stay balanced. I also have a huge passion for traveling and learning about different cultures. Some of my favorite places I’ve visited include Bosnia, Slovenia, and Germany. Traveling has taught me so much about the world and myself, and I’m always looking forward to the next adventure.

I’m thrilled to combine my love for accounting and my enthusiasm for learning here at The Tax Office. I’m looking forward to helping clients and continuing to grow in this exciting field!