@iHamza, as @AJD has written, your question could cover two situations:
If employees buy fuel with their own money on behalf of the company, use expense claims, which will be posted as liabilities in Employee clearing account. Then, as you pay employees, you would pay them not only for payslips but for expense claims lodged in that account. See Use expense claims | Manager. Local tax laws will determine whether such a reimbursement is taxable to the employee. Usually, it will not be, because you are only reimbursing money they already spent for you, not providing them additional income. You are just repaying a temporary loan from your employee for a company expense. A local accountant should be consulted. You may need to consult both the Expense Claims Summary and the various payslip reports when filing your own (or the business’) tax returns.
On the other hand, if you pay a fuel allowance as part of employees’ compensation, that could be taxable. In that case, the fuel allowance should be shown as an earnings item, as @AJD first suggested. Again, a local accountant or the tax authority can help you understand which situation applies.