I got charged 2 times, but different dollar amount to file my federal and state taxes. How can I receive a credit for the duplicate charge ? Why were they 2 different prices?

See this TurboTax support FAQ for checking your fees - https://ttlc.intuit.com/community/charges-and-fees/help/how-do-i-review-my-fees-in-turbotax-online/0...

To contact TurboTax customer service/support use their contact website during business hours. If the problem concerns any type of refund for fees, use the key words billing issues and do Not use the word Refund or you will get a phone number for tax refunds.

Use this website to contact TurboTax support during business hours - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax

Federal and state require two different fees.

I was charged 2 times to file my taxes

There are two fees, one for Federal and one for State. 

There are two fees, one for Federal and one for State. They are different amounts.