State of California sent me a notifice of tax return change

[Fermov]

I received a letter from Franchise Tax Board at california explaining my tax file  needs to be changedue wrong calculation, which means that instead to have a tax return of $1,168 now I need to pay $2,865!!! What can I do to confirm this is valid change???

[VolvoGirl]

Gee, that's about a 4,000 swing.   Do you see anything on your return for that much?  Like in the payments or credits?  Better look at each line on your 540 and see if you understand and agree with each amount.  Post back any lines you don't understand.  It might even be something wrong on your federal return.  So check that one too.  

[Mike9241]

we can't see your return or source documents. thus, if you can't figure it out you can either hire a pro or use

 The Audit Defense service is provided by TaxResources, Inc., also called TaxAudit.com, in partnership with TurboTax. If you paid for Audit Defense and you received a notice, call TaxResources, Inc. at 877-829-9695, or report your notice on their website at http://intuit.taxaudit.com/. Do not contact the tax agency until you have spoken to TaxResources. They may contact them on your behalf.