lilbki

I am completing a self assessment for the Higher Income Benefit Tax Charge. I know the exact amount I owe in tax for this, and when I complete my self-assessment without adding in the car benefit amount, the calculation matches with my expectations. When I add the car benefit amount, the tax amount owed increases significantly, well beyond the amount of child benefit I was paid in the first place, so its obviously trying to tax me for the company car too, despite the fact that I pay for this via my adjusted tax code (990L). Will it cause me issues to submit my return without the car benefit amount given that I already effectively pay tax on this via PAYE?