It unfortunately does not monitor leave entitlement, you may be able to find a third party app that can help you with this through apps.intuit.com
there isnt one that does, dont bother looking. when will such a standard thing be added to quickbooks? Its the law in the UK to pay peoples holiday accrued from zero hour contracts
If you have standard payroll already and you want to move over to the advanced payroll, you can not do this upgrade yourself, this is they you cant find it in your account, you would need to ring our support helpline and the agent will be able to raise this up to our t2 engineers, who would swap the payroll accounts over for you.