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  • Self Assessment UTR Enquiry

    Today I received three letters referring to my Tax calculations for 2018-19, 2019-20 and 2020-21. I notice that my Unique Taxpayer Reference (UTR) has changed. Is this an error? I wasn't informed that it changed 3 years ago and have been paying my Tax contributions using a different UTR. I've tried to call HMRC but nobody is answering my calls.