What you are asking is whether it is legal for Party A to cancel the contract in order to evade taxes by the company management trustee. Illegal. The business trustee of the company refers to the entrusting unit, namely Party A, and the entrusted unit is Party B. The business trustee of the company has tax evasion, that is, Party A has violated the law. If Party A evades taxes, Party B may terminate the contract. However, if Party A commits illegal acts, it will harm Party B's interests and violate the contract, so it is illegal to terminate the contract, and Party B may demand compensation from Party A. ..