When I paid to file my taxes the amount I was getting back changed from 1,021 to 254?

[MonikaK1]

If you haven't filed your return yet, and you are using TurboTax Online, you can preview your tax return and related forms and worksheets so that you can see how your refund or balance due was calculated. 

The dollar amount showing in the "refund meter" at the top of the screen may not always keep up with the latest entries you have made, especially if you have a slow internet connection or there is heavy traffic on the website.

Detailed calculation information in TurboTax Online can be found by navigating on the left side menu to Tax Tools > Tools > View Tax Summary > Preview My 1040 to access the Form 1040 Worksheet. 

This worksheet provides the in-depth, step-by-step calculations for your tax liability. 

If you are using the Online version, you will need to have paid for your product in order to see all of the worksheets.

[VolvoGirl]

Where are you seeing it change?  At the end Turbo Tax shows you the combined federal and state refund/tax due.  But that is only for your information.  Federal and state are completely separate.  You will still get the full refund and need to pay any  tax due.   Do you owe the difference to one?