I can’t remove my payment method?

Go to settings > apple ID > payment and shipping. Click edit in the top right corner and then delete the credit card you want to delete.

See this Apple support article—>If you can't remove your last payment method or use no payment method with your Apple ID - Apple Support

Anthony12_Gonzales Said:

"I can’t remove a payment method?: It says I have to pay for a active subscription?"

-------

Consider Using a PayPal Account:

How many method payments do you have? You need at least one. So, if you have no other card to use, then add a PayPal account that you have - or open a PayPal account if you have none - and assign it as you method of payment.

If you have any subscriptions you must have a payment method in your account. Go to Settings/[your name]/Subscriptions to review them.