Business Details
Trusted Accounting Services in Upland, CA
Karin Langwasser and Company is a professional accounting firm dedicated to providing personalized financial services to individuals and businesses across Southern California and the United States. With a team of experienced CPAs and tax professionals, we specialize in tax planning and preparation, financial statement analysis, business advisory services, and QuickBooks support. Our mission is to simplify complex financial matters while delivering expert guidance tailored to each client's unique needs. We prioritize transparency, client education, and proactive solutions to help clients maximize financial opportunities and maintain compliance. With decades of combined experience, our professionals bring specialized expertise in areas such as tax audits, estate planning, and business succession strategies.Committed to building long-term relationships, we offer responsive service and strategic advice to help clients achieve both immediate and long-term financial goals. Whether supporting small businesses or guiding individuals through personal financial planning, we emphasize reliability, ethical standards, and client-centric communication. Our firm combines technical proficiency with a personalized approach, ensuring clients receive practical solutions backed by deep industry knowledge.
Services
Tax Preparation
Financial Planning
Bookkeeping Services
Business Advisory
QuickBooks Support
Payroll Management
Tax Relief Solutions
Estate Planning
IRS Audit Representation
Succession Planning
Highlights and features
- We offer CPA-certified expertise in tax and accounting services
- Specialized QuickBooks Pro-Advisors provide software implementation support
- We provide strategic financial planning for business succession and estate matters
- Our team has decades of combined experience in tax law compliance
- We offer U.S. Tax Court representation for complex tax disputes
Services
Tax Preparation
We provide comprehensive tax preparation services for individuals and businesses. Our experts ensure accurate filing of federal, state, and local tax returns while maximizing deductions. Clients benefit from proactive tax planning strategies to reduce liabilities and maintain compliance with evolving regulations.
Business Advisory
Our strategic business advisory services help companies optimize financial performance. We offer cash flow analysis, profitability assessments, and operational guidance. Business owners receive customized recommendations for growth, succession planning, and long-term sustainability through regular financial reviews and forecasting.
QuickBooks Support
As QuickBooks Pro-Advisors, we offer complete software implementation, training, and troubleshooting. Our support includes system customization, data migration, and process optimization. Business owners gain efficient accounting workflows through tailored cloud-based solutions and ongoing technical assistance for day-to-day operations.
Tax Relief Solutions
We resolve complex tax issues through specialized relief programs. Services include IRS audit defense, penalty abatement, and negotiation of payment plans. Our experts handle tax lien releases, wage garnishment stops, and offers in compromise to provide financial relief while ensuring legal compliance for individuals and businesses.
Financial Planning
Our personalized financial planning addresses retirement readiness, estate preservation, and wealth management. We develop customized roadmaps integrating investment strategies, risk management, and tax-efficient approaches. Clients receive ongoing guidance to adapt their plans to changing life circumstances and economic conditions.
People
Karin Langwasser
Founding Partner
Certified Public Accountant with extensive experience in tax strategy and business consulting. Focuses on helping clients navigate complex tax regulations while providing strategic financial guidance for long-term success.
Rosa Paz
Managing Partner
CPA specializing in business advisory services and IRS audit representation. Brings decades of experience in tax compliance and financial planning for diverse industries across Southern California.
Shawn Hull
Partner
Tax expert with specialization in corporate accounting and succession planning. Provides strategic guidance to businesses on financial management and regulatory compliance matters.
Cindy Agostini
Partner
Certified tax professional offering expertise in estate planning and international tax matters. Helps clients implement effective tax strategies while maintaining compliance with federal regulations.
Sarah Scully
Partner
Experienced Enrolled Agent focusing on tax resolution services. Specializes in IRS negotiations, audit defense, and complex tax problem resolution for individuals and small businesses.
Questions
What accounting services do you offer for small businesses?
We provide comprehensive small business accounting including bookkeeping, payroll processing, cash flow management, tax preparation, business advisory services, and QuickBooks implementation support.
Do you handle complex tax situations and IRS issues?
Yes, we specialize in tax relief solutions including IRS audit representation, tax lien/levy resolution, and U.S. Tax Court representation for individual and business tax disputes.
Can you help with personal financial and estate planning?
Our services include personalized financial planning, retirement strategies, and estate tax planning to help individuals manage wealth and prepare for generational asset transfers.
Are you QuickBooks Certified Pro-Advisors?
Yes, we are official QuickBooks Pro-Advisors offering software setup, training, system optimization, and ongoing technical support for business accounting needs.
What industries do you specialize in serving?
We work with diverse industries including construction, healthcare, real estate, film/media, government contracting, and professional services firms across Southern California and the U.S.
