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IRC §280E — Q3 2026 Federal Estimated Tax Deadline

Starts: Tuesday, September 15, 2026
Authority: Internal Revenue Service ↗

Plant-touching cannabis businesses must make Q3 2026 federal estimated tax payments by September 15. IRC §280E continues to apply until DEA rescheduling is finalized and effective. Underpayment of estimated tax can trigger penalties on top of the already-elevated 280E burden.

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