I have a flag on my review for state taxes saying box 19 is incorrect. It is correct but box 18 is incorrect. I can only change the value of 19. How can I change 18?

If you are referring to the W-2 form, you should be able to change those boxes as needed to enter the correct information.  Also, the state return should accept what is in your W-2 for withholding, although not all state returns include local tax withholding.  Some states have separate local wage tax returns.

 If you are using TurboTax Online/Mobile you may want to clear any cache or cookies (not necessary for TurboTax Desktop).

In this situation, first please try clearing the cookies and cache.   It handles many issues that seem nonsensical on a regular basis with online activity. 

• Close your TurboTax return first.

Watch to be sure you are selecting 'all time' as example.  Do not use selections like 'last hour' for those browsers that give  you options.

• How to clear your cache

Once this is complete open your return and try again.

Please update here if you need more assistance and we will help.