What do I do if turbo tax messed my taxes up ?

First withholding is entered by the user so if you entered it incorrectly then it is your error and not the programs fault.  Next review what the state actually changed ... they should send a letter of explanation... are they correct ?

If you do find that the program was in error then you can put in for an accuracy guarantee ...

Any calculation errors on the part of TurboTax are covered under the Accurate Calculation Guarantee.  TurboTax will pay any penalties and/or interest due to a calculation error but not any taxes owed.  The Guarantee does not cover any user entry errors or omissions.

See this TurboTax support FAQ for the 100% Accurate Calculation Guarantee - https://ttlc.intuit.com/questions/2566201-what-is-the-turbotax-100-accurate-calculation-guarantee

See this TurboTax support FAQ for submitting a claim - https://ttlc.intuit.com/questions/1901269-how-do-i-submit-a-claim-under-the-turbotax-100-accurate-ca...

See this TurboTax support FAQ for documents needed to submit a claim - https://ttlc.intuit.com/questions/1901060-what-documents-do-i-need-to-submit-a-claim-under-the-turbo...