★ 406 · Updated 2026-09-30
Calculates federal estimated tax requirements, safe-harbor payments, due dates, annualized instalments, penalties, and withholding strategies for sole proprietors and single-member LLCs.
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★ 406 · Updated 2026-09-30
Calculates federal estimated tax requirements, safe-harbor payments, due dates, annualized instalments, penalties, and withholding strategies for sole proprietors and single-member LLCs.