Q3 estimated payments are due September 15. On extension? October 15 is closer than it looks.

Insights

Written by the partners, not a content mill.

Notes · August 23, 2026

Year-End Tax Moves Worth Starting in September

Several high-value tax moves for small businesses have hard deadlines in October, not December. Here is what Michigan business owners need to act on before the calendar turns against them.

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The Birchwood Brief

One useful tax note a month, straight from the partners.

Notes · August 16, 2026

Michigan Sales and Use Tax: Who Collects, and Who Owes

Michigan's flat 6% sales tax looks simple until you hit the services-versus-goods line, a use tax bill you forgot about, or an economic nexus threshold you quietly crossed. Here is what every Michigan small-business owner actually needs to know about collecting, remitting, and registering.

Notes · August 9, 2026

Home Office and Vehicle Deductions: What Survives Scrutiny

Home office and vehicle deductions are legitimate, valuable, and among the most commonly disallowed in IRS audits of Schedule C filers. This guide walks Michigan small-business owners through the exact rules, the numbers, and the records that make both deductions defensible.

Notes · August 2, 2026

S-Corp Election: The Revenue Point Where It Starts to Pay

The S-Corp election is not a status symbol or a universal tax hack. It is a math problem with Michigan-specific inputs, and the break-even is higher than most online calculators suggest. Here is the actual arithmetic.