
What Are the Biggest Tax Mistakes People Make?
What are the biggest tax mistakes people make? Learn which filing errors, missing records, and missed IRS notices cause extra tax, penalties, and stress.
Author Profile
Senior Finance & Audit Manager
Evgeniya Tretyakova is a Senior Finance and Audit Manager with over 15 years of experience in auditing, financial reporting, and international financial management. She has spent more than a decade working on financial due diligence, mergers and acquisitions, and internal control assurance for large multinational organizations, particularly U.S.-based transnational industrial groups.
Evgeniya has led complex audit engagements and financial restructuring initiatives in global environments, ensuring compliance with regulatory requirements while strengthening financial governance. Her experience includes managing GAAS-compliant audits, performing internal control assessments, and supporting post-merger integration processes and financial carve-outs for multinational portfolios.
She has extensive experience coordinating with Big Four audit firms and applying risk-based audit methodologies aligned with IFRS and U.S. GAAP. Evgeniya also works with enterprise systems and audit technologies, using tools such as SAP, Oracle, and data analytics platforms to improve audit efficiency and strengthen financial oversight.
Evgeniya holds an MBA in Finance from Università Telematica Internazionale UNINETTUNO. She is a Fellow of the Association of Chartered Certified Accountants (FCCA) and a licensed CPA in Kazakhstan, with U.S. CPA licensure currently in progress.
Articles
Audit, tax, and advisory resources from our team.

What are the biggest tax mistakes people make? Learn which filing errors, missing records, and missed IRS notices cause extra tax, penalties, and stress.

Am I in trouble if I get audited? Learn what an IRS audit usually means, when penalties may apply, and what steps to take after the notice arrives from the IRS.

What's the maximum you can claim without receipts? Learn the IRS rule, the narrow exceptions, and what records can still support a deduction in an audit.

IRS audit no receipts: learn what the IRS may deny, which records can replace receipts, and the best steps to take before deductions are cut back or denied.

Learn what an ERISA plan audit is, when it is required, what auditors review, and how plan sponsors can prepare for a smoother Form 5500 filing each year.

Learn the EBP audit meaning, when a plan audit is required, what auditors review, and what records plan sponsors should gather before filing Form 5500.

What is a retirement plan audit? Learn when it is required, what auditors review, and how it connects to Form 5500 rules, deadlines, and sponsor duties.

Learn what the IRS cost segregation audit techniques guide covers, what examiners review, and how to build a stronger, better-documented study for an audit.

Learn how to request an audit on a business, including what to send in the first email or RFP and how to compare licensed CPA firms before moving ahead.

Who can request an audit? See who may start or require a nonprofit audit, when outside parties can demand one, and when to report issues to the IRS clearly.

How do you write an email asking for an audit? Learn what to include, what firms need to quote the work, and when nonprofits should mention federal funding.

Nonprofit audit request guide for boards and leaders. Learn who can request an audit, what to include in an email or RFP, and when state or federal rules apply.