I have credit balance 11.06 and i want to subscribion my netfilx but they say insufficient remaining store credit

Prices displayed in the USA do not inlude tax since it varies according to the location of the purchaser's account settings. Other countries have one tax level for the entire country so a UK price will include tax but in the USA it will not.

Seems you forgot about the sales tax.

If you are in the USA did you include tax?

Call iTunes support. To assist you.

https://support.apple.com/en-gb/itunes

Fair play ours is always added. So that’s the price we pay. Unless it states excluding VAT.

https://help.netflix.com/en/node/25097

Something odd is going on. There were at least 4 more posts that have now disappeared entirely. Anyway:

1) I am guessing Hasanquaw is using an account with USA settings and is not remembering that any prices exhibited for the USA store do not show taxes. There is only $0.07 difference between the credit balance and the price of the subscription selected and $0.07 is insufficient to pay for the taxes charged in most US states.

2) Another poster observed that Hasanquaw appears to not be present in the USA. I see at least the phone service is being provided by a Bahrain company. In that case Hasanquaw should not be attempting to make a purchase in the USA store which violates Apple's Terms of Service. I don't think that is the meaning of the error message that was shown in an earlier image but it is the "solution".

Change your Apple ID country or region - https://support.apple.com/HT201389

The credit balance will need to be set to zero in order to change countries and the article I linked discusses how to do that.