Where are you seeing a "negative?"     If you are trying to figure out if you are getting an income tax refund-- look at your Form 1040.   If you are getting a refund it will be on line 35a.   If you owe tax due, the amount you need to pay will be on line 37.

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.

The "refund meter" will either have the refund amount   or  the balance due you owe  to the IRS or state ... click on that amount shown to get more info on this situation ...