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Eight practitioner-aligned domains. Each hub links every guide, calculator, and reference for that area, with primary authority citations on every page.

Individual Tax
Individual Tax
Filing status, AMT, EITC, CTC, kiddie tax, credits and deductions, NOL, hobby loss, capital loss, student loan interest.
25+ resources→
 Business & Entity
Business & Entity
Entity selection, S-corp, partnership, QBI §199A, depreciation, §179, OBBBA bonus, accounting methods, §481(a), Form 3115.
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 Real Estate
Real Estate
1031 exchanges, FIRPTA, cost segregation, depreciation recapture, passive activity loss, real estate professional, STR rules.
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 International Tax
International & Cross-Border
FBAR, FATCA, Forms 5471, 5472, 3520, 8938, dual-status, treaty positions, FEIE, FTC, expatriation, NCTI/FDDEI.
40+ resources→
 Retirement & Savings
Retirement & Savings
IRAs, Roth, 401(k), backdoor Roth, RMDs, HSA, FSA, 529, SEP/SIMPLE, NQDC, Form 5329, retirement saver credit.
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 Investments & Capital
Investments & Capital
Capital gains, NIIT, QSBS §1202, wash sale, qualified dividends, RSU/ESPP/ISO, crypto, Section 1256, K-1 reporting.
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 Estate & Gifts
Estate & Gifts
Lifetime exemption, portability, GST, GRAT/CRT, ILIT, SLAT, step-up basis, Form 706, Form 709, marital deduction.
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 State & Compliance
State & Compliance
State residency, multistate apportionment, P.L. 86-272, sales tax nexus, SaaS economic nexus, convenience-of-employer.
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Most-Used Tools
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Calculator
Substantial Presence Test
IRC §7701(b)(3) · Treas. Reg. 301.7701(b)
 Tool
FBAR & Form 8938 Checker
31 USC §5314 · IRC §6038D
 Calculator
Foreign Earned Income Exclusion
IRC §911 · Form 2555
 Calculator
Section 179 + Bonus Depreciation
IRC §179 · IRC §168(k)
 Calculator
Required Minimum Distribution
IRC §401(a)(9) · Pub. 590-B
 Calculator
Roth Conversion Analyzer
IRC §408A · IRC §72(t)
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Licensed since 2012
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The Methodology

What Validated Means

Most tax resources give you an answer. CPA Validated gives you the answer and the source - the specific IRC section, Treasury regulation, Revenue Ruling, or primary authority that backs it. Every time.

That is the standard applied at Big Four firms and in rigorous tax practice. It is the only standard that holds up when the answer is challenged. This site applies that standard to free public resources.

A tk.cpa resource. Built and personally validated by a licensed CPA and Enrolled Agent with active licenses in New York and Florida, IRS Enrolled Agent status, and a Master of Science in Taxation.

Validated
Every result traced to primary authority - the IRC section or Treasury regulation that justifies it.
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Tools and guides reviewed and updated annually. Thresholds, rates, and law updated when rules change.
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Nothing on this page constitutes legal, tax, accounting, or professional advice, and no professional relationship is created by your use of this website. CPA Validated is an educational website for information purposes only. Information should be verified against current primary authority, including the Internal Revenue Code, Treasury regulations, IRS guidance, and applicable state or local law, before being relied upon or acted on. Calculator outputs are estimates only and may be incomplete or inaccurate depending on the facts, assumptions, and inputs used. CPA Inc. and tk.cpa disclaim liability to the fullest extent permitted by law. Full disclaimer: cpavalidated.com/disclaimer.html