Comprehensive guide to Tax Court Jurisdiction cases, courts, and legal analysis.
Sirius Solutions v. CIR, decided by Fifth Circuit on January 16, 2026, resulted in a defendant win outcome. The Fifth Circuit affirmed the Tax Court's decision, holding that Sirius Solutions LLC was n...
Estate of Joseph A. Insinga v. Cmsnr. IRS, decided by D.C. Circuit on August 8, 2025, resulted in a defendant win outcome. The estate of Joseph A. Insinga challenged the IRS's assessment of additional...
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