Empowering Your Financial Future
Expert Online Accounting Solutions
Discover how 1800taxmasters can transform your business with our Tax & Accounting powered online services, designed to streamline your financial operations and drive growth.
Fractional CFO
Gain strategic financial leadership with part-time CFO services tailored to your business needs.
Tax Planning
Optimize your tax strategy to minimize liabilities and maximize financial outcomes.
Our Story
1800taxmasters was founded with a mission to provide accessible, high-quality accounting services to businesses of all sizes. Our values are rooted in integrity, transparency, and a commitment to excellence. We strive to empower our clients with the financial insights they need to make informed decisions and achieve their goals. Our team of experienced Tax & Accounting are dedicated to delivering personalized solutions that align with your unique business objectives.
Meet Our Founders
At the heart of 1800taxmasters are two visionary leaders dedicated to revolutionizing the accounting industry.

Angela Castillo, ABD, EA
Tax & Accounting Professional | Educator | Strategic Leader
Angela Castillo is a highly accomplished tax and accounting professional with extensive experience in financial management, tax strategy, and leadership. With a strong background in tax compliance, strategic planning, and workflow optimization, she has successfully led tax departments, improved operational efficiencies, and trained teams to achieve high-quality results.
Angela currently serves as the VP of Tax at 1800TaxMasters, LLC, where she oversees tax operations, develops tax processing procedures, and collaborates with cross-functional teams to integrate tax considerations into business strategies. Prior to this role, she held leadership positions at Ecom CPA, LLC, AC Professional Services, LLC, Talen Energy/PPL, and Schulman, Wolfson, & Abruzzo LLP, among others. Her career has been defined by her ability to implement scalable tax solutions, enhance compliance measures, and drive revenue growth.
In addition to her corporate expertise, Angela is an experienced educator, having served as an Adjunct Professor at Strayer University, where she taught accounting, tax law, and financial management at both undergraduate and graduate levels. She is passionate about mentoring and developing professionals in the field.
Angela holds an ABD in Financial Management from Walden University, a Master’s degree in Accounting & Financial Management from Keller Graduate School of Management, and a Bachelor’s degree in Accounting & Business Operations from Brooklyn College. She is also an Enrolled Agent (EA) with the IRS and has passed sections of the CPA exam.
With a keen eye for process improvement, Angela has successfully increased tax department revenues, implemented efficiency-driven policies, and fostered collaborative team environments. Her proficiency in various tax software platforms, ERP/CRM systems, and accounting tools makes her an invaluable asset in any organization.
Fluent in Spanish and well-versed in tax law, compliance, and financial strategy, Angela Castillo continues to excel as a leader, consultant, and educator in the tax and accounting industry.

Ariel Castillo
Financial Strategist and Controller Services Expert
Common Questions About Our Services
Explore the answers to some of the most frequently asked questions about our services to better understand how we can assist you.
What is a Fractional CFO and how can it benefit my business?
A Fractional CFO provides part-time financial leadership, helping your business with strategic planning, cash flow management, and profitability optimization without the expense of a full-time CFO.
How does a Fractional Controller support my company?
A Fractional Controller oversees your accounting operations part-time, ensuring accurate financial reporting, compliance, and internal controls, which supports business growth and stability.
What are the advantages of tax planning services?
Tax planning services help minimize tax liabilities through strategic planning, optimizing deductions and credits, and ensuring compliance with tax laws, ultimately maximizing your financial outcomes.
Why is monthly accounting important for my business?
Monthly accounting ensures accurate financial tracking and reporting, providing up-to-date records that support informed decision-making and compliance.
How do I know which service is right for my business?
Our team can help assess your business needs and recommend the appropriate services to support your financial goals and growth.
Ready to Transform Your Financial Strategy?
Our Comprehensive Financial Services
At 1800taxmasters, we offer a range of services designed to meet your financial needs and help your business thrive.
Fractional CFO
Our Fractional CFO services provide strategic financial leadership, including cash flow management and profitability optimization, tailored to your business needs.
Fractional Controller
With our Fractional Controller services, receive expert oversight of your accounting operations, ensuring accurate financial reporting and compliance.
Tax Planning
Our tax planning services help you minimize liabilities and maximize efficiency through strategic planning and compliance with tax laws.