A payment on my Apple ID is being made for which I do not know what it is

This is primarily a user-to-user support forum; other Apple users like you. We don't have access to information about charges to your account. Apple has a support article about charges — see each of the steps in the following instructions. They include information on contacting Apple Support if the other steps don't help. See: If you don't recognize a charge - Apple Support

or go to Subscriptions and Billing - Official Apple Support

The following may also help: If you want to cancel a subscription from Apple - Apple Support

Or if you have an upgraded iCloud storage plan, cancel upgraded iCloud storage by downgrading to the free 5GB plan. See instructions in the following Apple article: Downgrade or cancel your iCloud+ plan - Apple Support

First I would find out what it is. See the first paragraph of my first reply.

Then, if it is subscription to an app, click on the Apple Support article in the second paragraph of my previous reply and if it is for upgraded iCloud storage, click on the article in the third paragraph.