When is CGT paid on property sale reported on SA?

I am helping my mum with her SA after my dad passed in November. They sold a flat (not primary residence) in Sep 2023, reported it and paid CGT tax in Oct 2023 They then reported it on their 2022/23 Tax Return... which seems like a year too early?! Was that right? If not should I report it again this year, or just say "it has been reported once, that is good enough", or put a note in the CGT comments?! Thanks!

Hi ,
 

As the property was sold in Spetember 2023, this is the 23/24 tax year. You will therefore need to amend the 22/23 return to remove the capital gains info and now include it with the 23/24 tax return  . Thank you .