TRN Registrationtaxexpert2022-12-22T06:49:22+00:00 TRN Registration TRN (Tax Registration Number) is the identification number given to every taxable business registered under UAE VAT. It is mandatory that only business having a valid TRN should charge VAT on supplies.To know more Click here, please feel free to contact us at +971 600 57 5550 or email us at taxsupport@skylines.ae for assistance. (Monday to Friday 9:00 am to 6:00 pm).