Can't access medical insurance info

I was made redundant from my previous job in December last year, as the company was closing its London office. Consequently, no P11d was filed, the payslip portal is no longer accessible and I have no way of accessing information about my medical insurance. I'm sure I paid a separate tax bill related to this company benefit early this year but there is no record of this in my personal online area on the HMRC site. I just want to avoid paying tax on this twice. Any guidance appreciated.

Hi.

If you contact HMRC we can check on benefit in kind details on your record. You can contact HMRC at:

Income Tax: general enquiries

Thank you.