How to change address relating to role of executor

Hi I moved a couple of months ago. I used the change of address function on the HMRC website (https://www.gov.uk/tell-hmrc-change-address) to notify HMRC. When I log in to my account/government gateway my new address shows as my main residence and correspondence address. But for some reason I continue to receive at my old address letters from HMRC relating to my role as executor of a will. I cannot find anywhere on the site to update my address specifically for communication relating to this. Could anyone please offer any advice? Thank you

Hi,
As we would need to access your record to review this for you, you will need to contact our Income Tax team for advice.
Income Tax: general enquiries
Thank you.