A lawsuit to cancel two tax notices-decisions is undertaken for the client. The protection against the tax notifications is based on a violation of the procedure for conducting an unscheduled tax audit, the lack of authority of the State Tax Service of Kyiv to inspect the client, the illegality of the witnesses’ explanations as evidence of the absence of business transactions. Objections against the tax audit report, a complaint to the State Tax Service of Ukraine and a claim to the administrative court on cancellation of the tax notices-decisions are substantiated and submitted.