what is the fee for my monthly account using apple

There is no monthly fee for using an iPad.

If you have a cellular iPad with an active sim in it,

there will be a monthly charge from your wireless provider

and they can provide the information you seek.

If you have signed up for any Apple services such as

extra iCloud storage, Music, etc, there will be monthly charges

for such services.

If you signed up for AppleOne, this link will give you a start:

https://www.apple.com/apple-one/

If you signed up for any/various Apple services individually,

start at www.apple.com and look for the service(s) you agreed

to.

Subscriptions information are found at:

https://support.apple.com/en-gb/guide/ipad/ipadee10c6e7/ipados

If this is not what you are asking, provide more information so

someone may offer a solution.