What is the ruling on accounting firms evading the payment of the true value of the due tax?

If taxes are unjustly imposed, then it is permissible to evade and circumvent them. However, if they are in return for services or to meet the needs of the nation and the interests of the people equitably, then it is not permissible to circumvent them. Concealing profits in such a case is considered deception and cooperation in sin, as Allah Almighty says: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression."