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Thank you for reaching out.
In my experience, Microsoft moderators in this forum usually have access to the relevant documentation. As such, they can often share it directly or advise you on the proper procedure for obtaining Microsoft tax certificates via private message.
With this in view, @Jack Bui, could you help @Mikita Sasonka to obtain the Tax Residency Certificate 2026? A private message may be the most effective way to handle this matter.
At the same time, I understand how important this matter is, and I sincerely hope that the author of the original question will soon receive a helpful answer.