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Trusted Accounting and Tax Services in Upland, CA
Karin Langwasser and Company CPAs, LLP has been delivering professional financial guidance to individuals and businesses across Southern California and the United States for years. Our expertise spans tax management, accounting services, financial planning, and strategic advisory, with a focus on personalized solutions tailored to each client's unique needs. As a full-service accounting firm, we specialize in business and individual tax planning, financial statement preparation, virtual CFO services, and tax agency audit representation. Our team of certified professionals is committed to helping clients navigate complex tax laws while maximizing profitability and long-term financial success.

We pride ourselves on combining decades of industry experience with cutting-edge accounting software implementation and support to deliver cost-effective, reliable services. Whether you require basic bookkeeping or advanced estate planning, our approach emphasizes transparency, ethical standards, and client education. Our QuickBooks Pro-Advisors provide specialized software solutions, while our U.S. Tax Court representation ensures expert defense in complex tax matters. Through strategic partnerships and community engagement, we maintain our position as a trusted local accounting authority dedicated to client satisfaction.
Services
Tax Preparation Financial Planning Bookkeeping Payroll Services Audit Representation Estate Planning QuickBooks Support Business Advisory Tax Relief Financial Statements
Highlights and features
  • We offer over 20 years of experience in accounting and tax services.
  • Our team consists of certified QuickBooks Pro-Advisors with specialized software expertise.
  • We provide U.S. Tax Court representation for complex tax disputes.
  • Our virtual CFO services deliver strategic financial guidance for growing businesses.
  • We combine personalized service with comprehensive financial planning solutions.
Associations and certifications
  • QuickBooks ProAdvisor
Services
Tax Preparation
We prepare and file individual and business tax returns with precision and compliance. Our team stays current with evolving tax laws to maximize deductions while ensuring timely submission. Clients receive strategic tax planning to minimize liabilities and optimize financial outcomes.
Financial Planning
Our financial planning services create customized roadmaps for long-term financial success. We analyze current financial status, develop investment strategies, and implement retirement plans. This service helps individuals and businesses achieve financial goals through structured, data-driven approaches.
Audit Representation
We provide expert representation during IRS and state tax audits. Our professionals handle all communications, prepare necessary documentation, and negotiate resolutions. This service protects clients' interests while ensuring compliance with tax regulations and legal requirements.
QuickBooks Support
As certified QuickBooks Pro-Advisors, we offer software setup, customization, and troubleshooting. Our support includes training sessions, data migration, and integration with business systems. This service optimizes accounting processes for improved financial management efficiency.
Business Advisory
We deliver tailored business advisory services covering cash flow management, succession planning, and operational strategy. Our consultants analyze financial health, identify growth opportunities, and implement solutions to enhance profitability and long-term sustainability.
Questions
What accounting services do you offer for small businesses?
We provide bookkeeping, payroll, cash flow management, business advisory, and financial planning services tailored to small business needs.
Do you handle tax preparation for both individuals and businesses?
Yes, we offer comprehensive tax preparation services for individuals, corporations, partnerships, and non-profit organizations.
Can you assist with QuickBooks software implementation?
Our QuickBooks Pro-Advisors provide setup, training, troubleshooting, and optimization services for businesses using QuickBooks software.
What tax relief options are available through your firm?
We help clients resolve IRS issues including payment plans, offers in compromise, audit representation, and back tax resolution.
Do you offer virtual CFO services for growing businesses?
Yes, our virtual CFO services provide strategic financial guidance, budgeting, and forecasting for businesses needing executive-level financial expertise.
What areas do you serve beyond Upland, CA?
We serve clients throughout Southern California and provide remote services to businesses and individuals nationwide.