SIP and Self Assessment

Hello At my previous employer I was part of a SIP. I left that employer and some of my SIP shares were sold at the pay to pay my tax liability for taking the shares out of the SIP. What figure do I use for my self assessment? The letter from the scheme provider states amount liable for income tax and NI as ~£12,000 and taxable & NI-able (sic) amount as ~£5,000. Does this mean HMRC see that ~ 12k figure as additional income? Despite my not having the money just the share certificate?

Hi,

As the amounts will be included on your p60 or p45, you just declare it as employment income.

Thank you.