My taxes went down after i filed and got accepted. It was supposed to be 800 and went to 340 overnight

[DavidD66]

Refund and tax due amounts do not change in the return after the return is filed - it's not possible, Perhaps you saw the combined state and federal refund,and are now seeing only the federal.  Or, perhaps you saw a refund amount before you finalized your return.  If you are referring to a change made by the IRS after you filed, that happens often due to information missing or being incorrect in the return. 

[Elimit21]

That doesnt even make sense for it to be the tax combined. How do you get 800 from 300 and 100. This is crazy it literally told me i was getting 811 yesterday and overnight it changed. Fishy to the max