Hi @info68df7b,

Welcome to Trend Micro Community for Home Users!

There is no direct way to update your credit card or billing details on our site. To update your payment or billing details, cancel the automatic renewal and renew your Trend Micro subscription manually. Check this link below on how to do it.

How to Update Trend Micro Billing Info | Trend Micro Help Center 

I spent thirty minutes clicking on various links only to be brought back to the first page where a BLUE button suggests - Update Credit Card , and when you click that it takes to another page that says the same thig, around and around - the world of IT is run by Indians who are the least responsible people next to Israelis on this planet - Am cancelling this dud subscription - if I could find a way too....