Previous Earning - taxable company car

[Antar]

Hi
My salary consts of fixed amount + company car which I can use for any purpose (as private car), it appears in the salary slip as amount which is not paid but added to the gross salary which is taxed and national insurance is paid also for this amount. so its including of the total amount before tax.
Can I include it as previous earnings?
if Yes, do I need to get support document from my employer? or it's enough that it's taxed?

Another question, I have also these texed amounts:
1. Bonus - which I get if I performance will (I'm paid the amount after tax)
2. health insurance + meals amount which is added for taxing, are they considered as earnings? (I pay tax for them)

Thanks!