zsis) - Center for Swiss and International Tax Law

Declaration obligations, advisor liability and mitigation of penalties: hot topics in criminal tax law

If declaration obligations are breached - both in the mixed assessment procedure and in the self-assessment system - which lead to a (possible) tax reduction, the question of criminal liability regularly arises in addition to the levying of any additional tax. The representative of the taxable person is increasingly being targeted by the tax authorities.

Criminal tax law risks of tax advice

As the legally compliant fulfillment of tax obligations requires knowledge of tax law, which the taxpayer often lacks in whole or in part, many taxpayers seek help in fulfilling their declaration obligations. If there are declaration errors that lead to at least the threat of a tax loss, the involvement of a specialist does not release the taxpayer from their responsibility for their tax declaration. Conversely, the professional involved, the tax advisor, can also be targeted by the authorities responsible for prosecuting tax offenses.

Dangerous game with risk of discovery - The criminal tax liability of external advisors and internal functionaries in the light of the Federal Supreme Court rulings 6B_90/2024 and 6B_93/2024

The Federal Supreme Court rulings 6B_90/2024 and 6B_93/2024 of February 3, 2025 raise fundamental questions regarding the criminal liability of tax advisors. The focus is on the requirements for perpetration of tax evasion and incitement to do so, as well as the distinction between permissible tax advice and punishable cooperation. The judgments shed light on the different roles of internal and external advisors and their significance for practice and the application of the law.

Unfair conduct by taxpayers when determining tax domicile in an intercantonal relationship

As tax evasion presupposes a breach of procedural obligations, this article takes a closer look at the procedural obligations, in particular the taxpayer's duty to cooperate, both in ordinary assessment proceedings and in tax domicile proceedings. Finally, the supplementary tax procedure is also addressed, taking into account the latest case law of the Federal Supreme Court on the terms "unknown" or "new" facts and evidence.