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Tax Filing

Tax filing procedures, deadlines, and best practices

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July 25, 20256 min read

S-Corp Tax Filing Deadlines: A Crisp Guide for Beancount Users

For tax year 2026 calendar S-corps, Form 1120-S is due March 15, 2027 (Form 7004 extends to September 15, 2027); late §6699 is $260/shareholder/month.

Mike Thrift

s-corptax-filingbeancount

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