Extra iCloud storage

Thank you for that information, and welcome to Apple Support Communities!

To upgrade your iCloud + plan https://support.apple.com/en-us/HT201318

Please check to see if you are family sharing

If you are family sharing, and someone in your family group is sharing purchases, all purchases will go to that member.

They will need to turn off purchase sharing.

You will need to have your own payment method on file. You can do this by following this resource.

https://support.apple.com/en-us/HT201266

Hope this helps ;)

B510 Said:

"Extra iCloud storage: If I wanted to get more iCloud storage for my iPhone 11 would it be charged to my card on my apple account or to my parents phone bill?"

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Order of Payments:

It would be charged from your Apple Account first, and then would be charged to your card (credit or debit card). The phone bill is that of your Carrier --nothing on Apple's side.

B510 Said:

"So I wouldn’t have to worry about my parents phone bill going up at all due to extra storage?"

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No. You are all set.

are you in a country or region that accept carrier billing as a payment method?