sram

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