Denis Mashkov

Denis Mashkov

Languages Spoken: English, Russian
Montrose, California
CPA

About Denis Mashkov

With over 14 years of experience in tax, accounting, and tax planning, Denis Mashkov brings a depth of expertise that few CPAs can match. Based in Los Angeles and serving clients fully remotely, Denis has led accounting teams for non-profit organizations, commercial real estate private equity firms, and publicly traded manufacturing companies — giving him a rare, well-rounded perspective across industries and entity types.

Today, Denis channels that corporate-level expertise into something more personal: helping small business owners navigate the complexities of the tax code with confidence. Whether you're looking to minimize your tax burden, get your books in order, or build a proactive tax strategy for the year ahead, Denis provides the kind of attentive, hands-on service that larger firms simply can't offer.

As the owner of MashCPA, Denis is known for being responsive, thorough, and genuinely invested in his clients' success. He takes the time to understand your unique situation and communicates clearly — no jargon, no runaround. His bilingual fluency in English and Russian is an added bonus for clients who prefer to work in either language.

If you're a small business owner in need of a trusted CPA who treats you like a priority, Denis Mashkov is ready to help.

Tax Agencies Serviced

Federal Tax Agencies

  • Internal Revenue Service

State Tax Agencies

  • California Department of Tax & Fee Administration (CDTFA)
  • California Employment Development Department (CA EDD)
  • California Franchise Tax Board (CA FTB)

Reviews

0.0

Customer Rating

0 Reviews

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Problem Experience

  • Unpaid Taxes
  • Past Due Tax Return
  • Unfiled Returns - No Balance
  • Tax Penalties
  • Notice of Deficiency
  • Spousal Tax Issue
  • Tax Refund
  • Tax Return Mistake

  • Unpaid Taxes
  • Unfiled Tax Returns
  • Tax Penalties
  • Sales Tax Audit or Examination
  • Sales Tax
  • Penalty Abatement

  • Unpaid Taxes
  • Unfiled Tax Returns
  • Tax Penalties
  • Tax Audit or Examination

  • Unpaid Taxes
  • Unfiled Tax Returns
  • Tax Penalties
  • Tax Audit or Examination
  • Franchise Tax Issues

Solution Experience

  • Payment Plans
  • Individual Tax Preparation
  • Partial Payment Installment Agreement
  • Penalty Abatement
  • Amend Tax Returns
  • Business Tax Preparation
  • Trust Tax Preparation
  • Estate Tax Preparation
  • Audit Representation
  • Streamlined Filing Procedure
  • Tax Refund Support
  • IRS Transcript Analysis
  • Tax Consultation Service

  • Installment Agreement
  • Penalty Abatement
  • Sales Tax Preparation
  • Audit Defense and Support

  • Installment Agreement
  • EDD Assessment Appeals
  • Employment Tax Preparation
  • Amend Tax Returns
  • Audit Defense and Support

  • Installment Agreement
  • Individual Tax Preparation
  • Penalty Abatement
  • Business Tax Preparation
  • Amend Tax Returns
  • Audit Defense and Support

Tax Types Serviced

Corporate Tax Employment/Payroll Tax State Sales & Use Tax Gift Tax/GST Tax Estate & Trust Income Tax (Form 1041)

Taxpayer Types Serviced

Individuals Sole Proprietor Limited Liability Companies S-Corporations C-Corporations Estates Partnerships/Multi-Member LLC

Professional License & Designations

Compliant Icon

Professional Licenses

State/Federal
CPA
California 6/1/2016 Active

Related Work Experience

Not Provided

Education

Educational Institution Degree Graduation Year
University of California, Santa Barbara Bachelor's Degree 2012

Associations & Memberships

Not Provided

Contact Information

Address


Montrose, California 91021

In Office Visits

No

Pricing & Payments

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