R/GB I/2

Hi, Please can someone help me on where I should send the R/GB I/2 form to get it stamped by HMRC? I am struggling to find it on the HMRC website. Thanks, 

Hi Uzma Shahid,
Please refer to guidance here:
How to apply for a certificate of residence to claim tax relief abroad
If applying on-line, please attach the R/GB I/2 form to your request.
Alternatively you can send the form to:
Corporation Tax Services,
H M Revenue & Customs,
BX9 1AX.
Thank you.