How can I use the balance I have in my apple account towards a 1 yr subscription to apple tv. I have $71.00 but i do not see an option to pay with my balance, only credit card?

See -> Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

• if you want to use your Apple ID balance, you need to set your Apple ID balance as your default payment.

From this support article --> How apps, content, and subscriptions from Apple are billed - Apple Support

"Which payment method is charged?

When you buy items or pay for subscriptions, Apple automatically attempts to charge your payment methods in this order:

1. Apple attempts to use your Apple ID balance to cover the full amount. (This is not something you need to set, and you cannot change it.)

2. If you don't have Apple ID balance, you don't have enough to cover the full amount, or an item cannot be paid for with Apple ID balance, Apple attempts to charge your primary payment method (typically a credit or debit card, but varies according to country). The primary payment method is at the top of the list in Settings on your iPhone. You can control which payment method is at the top of the list.

3. If there's a problem with the primary payment method, or if the primary payment method can't be charged for the full remaining amount, Apple attempts to charge your other payment methods in order from top to bottom. If none of them can be charged, Apple may try again.

Some purchases aren’t charged to your Apple ID balance

● If you're in a Family Sharing group, purchases are charged to your personal Apple ID balance. If you don't have enough Apple ID balance to pay for the purchase, the remainder is charged to the family organizer's primary payment method.

● You can’t charge gifts to your Apple ID balance. If you send a gift or gift card, your primary payment method is charged.

● Some subscriptions might not be charged to your Apple ID balance.

If none of your payment methods can be charged

If a purchase can't be charged to any of your payment methods, your account has a negative balance. You can't buy more items or update your apps until you update your payment method."

Yes, see -> Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

⤵️

1. Open the Settings app.
2. Tap your name.
3. Tap Media & Purchases, then tap View Account. You may be asked to sign in with your Apple ID.
4. Tap Manage Payments.
5. Tap Add Payment Method.

 6. Enter the payment method details, then tap Done.

If you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK) 

debneil wrote:

But that's my issue, when I go into manage payments, the only option i have is to select a credit card or paypal. I would like an option that lets me use my apple account balance. How can I do that without giving Apple my credit card info

You must add a credit card (or some other payment type that Apple will accept -- they don't have a specific list of ones that will meet this requirement, you just have to keep on trying, but it's usually a credit or debit card), even if the money will end up being taken from your account balance anyway. You cannot select or deselect account balance because that will be used automatically if it can be (some things won't use it). You don't have any choice in it either way so it isn't an option you can choose or not. That is why you only see the other payment options that require you to enter something.

This document explains how to add a payment method to your Apple ID on a Mac, Apple mobile devices, PC, or online. Click here --> Add a payment method to your Apple ID - Apple Support

On an iPhone:

Open the Settings app.

Tap your name.

Tap Media & Purchases, then tap View Account. You might be asked to sign in with your Apple ID.

Tap Manage Payments.

If you are being asked to enter a payment method, Apple has multiple criteria* requiring the presence of a payment method, even for free items. Since you may be encountering one of those situations, you have no option but to enter a valid payment method if you wish to continue downloading. Read the support article Add a payment method to your Apple ID - Apple Support about how to do that. The payment method may not be charged if you also have account balance or the item is free, but the payment method has to be present. This next article lists valid payment methods for different countries but note that in this situation Apple Account balance alone apparently may not meet the requirement and you need to use another payment method until you find one that satisfies Apple's requirement (often a credit or debit card): Payment methods that you can use with your Apple ID - Apple Support .

* Ref.:

If you can’t download or update apps on your iPhone or iPad - Apple Support

- "You might need to have a payment method on file, even if the app that you want to download is free."

Remove a payment method from your Apple ID - Apple Support

- If you have any active subscriptions, you must have at least one payment method on file other than Apple ID credit.

- You might not be able to remove a payment method if you have a balance due.

Sign in with your Apple ID - Apple Support

- "When you sign in to the App Store and other media services for the first time, you might need to add a credit card or other payment information."

How apps, content, and subscriptions from Apple are billed - Apple Support

- You can’t charge gifts to your Apple ID balance. If you send a gift or gift card, your primary payment method is charged.

- Some subscriptions might not be charged to your Apple ID balance.

What you can buy with your Apple Gift Card or Apple Account balance - Apple Support

"Some purchases might require that you have a credit card on file, even if you use your Apple Account balance to make the purchase."