Are you sure you talked to the real IRS? Did they send you a letter? I would wait for a letter in the mail saying what is wrong and if you owe more. Don't ever give your credit card number over the phone.
You can Contact Turbo Tax Customer Service
5am-5pm Pacific Time
Monday-Friday
https://support.turbotax.intuit.com/contact/
What is the Turbo Tax phone number
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
