How do I find out how much my gift card is.

Should be a number on the back of the card you can call.

Any register or customer service counter can tell you

Cash register or customer service

Call the number on the back or go into any Wal Mart and they can scan it and tell you.

As Karla said , should be a tag on it that says dollar amount.. and if no tag on it , as Warren said , ask customer service