A Solo 401(k) crosses into mandatory Form 5500-EZ filing once combined plan assets exceed $250,000 on the last day of the plan year. Late filings cost $250 per day up to $150,000 annually, but Rev. Proc. 2015-32 caps catch-up filings at $1,500 per plan if no penalty notice has been issued.
Section 183 of the Internal Revenue Code denies loss deductions for activities not engaged in for profit. The IRS applies a nine-factor test and a three-of-five-years safe harbor (two of seven for horses) to distinguish a real business from a hobby — here is what each factor weighs and how to document profit motive before an audit.
How the IRS taxes crypto staking, mining, and DeFi income in 2026 — covering Revenue Ruling 2023-14, Form 1099-DA, wallet-by-wallet basis tracking, Schedule 1 line 8v, and which forms apply to each digital asset event.
Form 1042-S reports US-source FDAP income paid to foreign persons. US businesses act as withholding agents with personal liability — default 30% withholding, W-8 documentation rules, March 15 deadlines, and stiff per-form penalties. This guide covers W-8BEN versus W-8BEN-E, treaty rate reductions, the source-of-income rules, and common mistakes like sending Form 1099 to a foreign contractor.
Section 530 of the Revenue Act of 1978 eliminates back federal employment taxes on misclassified contractors when small businesses pass three tests — reporting consistency, substantive consistency, and reasonable basis. Revenue Procedure 2025-10 updated the rules in January 2025, the first major change in 40 years.
How the IRS uses Internal Revenue Code Section 6672 to hold business owners, officers, bookkeepers, and even spouses personally liable for 100% of unpaid payroll withholdings — covering who qualifies as a responsible person, how willfulness is established, and how to defend a Letter 1153 within the 60-day appeal window.
Form 5471 carries automatic $10,000-per-corporation initial penalties capped at $60,000 per year for U.S. persons who own, control, or serve as officers of foreign corporations. Covers the five filing categories, modular schedules, GILTI's rename to NCTI for tax years beginning after December 31, 2025, and the Streamlined and Delinquent Submission routes back into compliance.
A practical guide to Form 709 for 2026 gifts — who must file, the $19,000 annual exclusion, the $15 million lifetime exemption, gift splitting rules, the adequate disclosure standard that starts the IRS three-year clock, and the medical and tuition payments that escape reporting entirely.
NFTs are taxed as property under US rules. Long-term gains on collectible NFTs are capped at 28%, creator sales are ordinary self-employment income, and Form 1099-DA reporting from marketplaces begins with 2025 transactions. This guide covers the math, the forms, and the moves to make before filing.
Section 1031 lets real estate investors defer capital gains and depreciation recapture by swapping investment properties, but only when the 45-day identification window, 180-day closing deadline, qualified intermediary rules, and post-TCJA like-kind requirements are followed exactly.
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