Changing Company cars mid year

I have been asked by support to put this through as a new idea, but Earnie payroll already does it!. If an employee changes car mid month, from a high co2 level to an electric car, and are due to a refund of Bik, Staffology calculates the correct value, but divides it between the remaining months of the tax year, Earnie payroll shows the refund on the current month's payslip, which is correct.