As you are not using any of the payroll systems it would be a case of creating a manual record of how much Employers NI you have generated and then once it has been used start including the figures. We are not trained accountants and we would ask ...
Maybe you did not intend that to be the case. I did calculate that in my response. It's why I did not make a declarative conclusion in my original response to you -- wrote in first sentence: "...are you suggesting that TC is on par with SJ as Apple CEO...