AJ Żmuda-Trzebiatowscy Doradztwo Podatkowe is an independent tax advisory company located in warsaw established in March 2021 by a former Tax managing partner and head of transfer pricing at Arena Tax Joanna Żmuda-Trzebiatowska, and Andrzej Żmuda-Trzebiatowski, are supported by a team of seven professionals with a focus on transfer pricing and advisory on international tax.

During the research period, the firm aided with the tax relief implementation of a publicly traded game development company.