2022-23 Coding Notice

How can I see my coding notice from 2022-23? I can see my code but I need to see how it was calculated and if it was adjusted to take into account any underpaid tax. "If you pay tax under PAYE, your 6 April 2022 to 5 April 2023 tax code may have been adjusted to collect tax you owe for earlier years. Look at your 6 April 2022 to 5 April 2023 PAYE Coding Notice (P2). If it includes an 'amount of underpaid tax for earlier years' then this amount is automatically shown above."

Hi James Wright,
To get the breakdown of your 2022/23 tax code you will need to contact HMRC:
https://www.gov.uk/government/organisations/hm-revenue-customs/contact/self-assessment
Thank you.