Unique Transaction Reference Number (UTRN)
The UTRN can be found on:
• the submission receipt, if you've filed your SDLT return online
• the foot of page 2 of the paper return SDLT1
• on the payslip found on page 7 of the paper return SDLT1 (in the box marked 'reference number')
Enter 'none', if you do not have a UTRN