Professional tax preparation for individuals and married couples, ensuring accuracy and maximizing deductions.
Comprehensive tax solutions for small businesses, including filing, planning, and industry-specific advice.
Expert assistance with QuickBooks setup, categorization, and troubleshooting for efficient financial management.
Strategic guidance on business structuring, startup issues, and financial planning to optimize growth and compliance.
Personalized tax strategies and ongoing advice to help clients stay on top of their taxes and save money year-round.
Osiris CPA is outstanding — professional, knowledgeable, and incredibly efficient. Mo took great care of my family and I. They made tax season stress-free and saved me money. Highly recommend!
We had an excellent experience working with Mo at Osiris CPA, PLLC! He not only helped us with our first joint tax filing as a married couple, but also handled our business taxes with care and professionalism. As small business owners, we really appreciated the time he took to guide us through everything and set us up for success moving forward. Mo was happy to answer all of our questions and concerns, no matter how small, and gave us great advice to ensure we stay on top of our taxes for years to come. After reading so many positive reviews, we had high expectations—and he definitely delivered. We look forward to working with him again in the future!
My first experience filing my taxes with a company like Osiris was excellent. Mo and Amber are very nice, knowledgeable and super helpful. The flexibility was convenient and they made sure I got the most out of my taxes. This is where I will be filing my taxes from now on. Highly recommend!
Mo has been great. He has very fair prices. He has taken time to understand our industry, and has helped tremendously with Quickbooks and issues that come up with starting a new business, where to categorize things, and the best way to structure the company. My husband and I are pleased and recommend that you seek his assistance if you need a CPA.
I've been working with Mo at Osiris CPA for almost 2 years. After many different CPAs I'm happy to say I've found one that is very knowledgeable, understands my relatively complicated tax landscape, is VERY responsive and is generally a very nice person to work with. I'm very happy and plan to continue working with Mo for a long time.

Expert accounting and tax solutions for individuals and businesses in Tucson.
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Osiris CPA, PLLC is a premier accounting firm in Tucson, AZ, specializing in comprehensive tax preparation, business consulting, and financial planning. Led by Mo and his dedicated team, we provide personalized, professional services for individuals, married couples, and small business owners. With a perfect 5-star rating from 37 reviews, we are committed to making tax season stress-free, offering expert guidance on QuickBooks, business structuring, and maximizing returns. Our client-focused approach ensures you receive attentive care and strategic advice for long-term financial success.
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