Hi m60vxr,
Given that you sold the residential property in July 2023 (which falls within the current 2023/24 tax year) you should report the relevant details when you come to complete your 2024 return Self Assessment tax return.
the two relevant boxes in the 2024 SA108 will be headed (a) ' Total gains or lossess on UK residential property reported on Capital Gains Tax UK Property Disposal return(s) and (b) Tax on gains in box (a) already charged.
Capital Gains Tax summary notes
Thank you.