State of California

[peterbrown1]

The State of California cut my refund in half and said I calculated it wrong. If it is wrong, then YOU calculated it wrong.

[VolvoGirl]

Turbo Tax is a self prepared return.  It has no way of knowing or checking that you entered something wrong or in the wrong place or entered something twice  Or left something out.  It doesn't check against any outside sources.  The IRS or state has copies of all the W2s and 1099s your employer and banks/brokers, etc. sent in to match against.  Turbo Tax only checks the calculations of what you entered.   It is your responsibility to check it over before you file.  They only Guarantee that the calculations are right based on the entries you made.

https://ttlc.intuit.com/community/charges-and-fees/help/what-is-the-turbotax-100-accurate-calculatio...

[SweetieJean]

As @VolvoGirl stated, TT's arithmetic calculations are correct.  When the IRS or state changes something on your filing, the original refund is wrong, and thus called a "math error" (even though it isn't).  Wait for a letter from the state.