Didn’t receive full refund

Like many others, I did not receive my full tax return. 

I got $425 out of $1,825. 
I am not married, have no dependents, debts/offsets, etc that would cause me to not receive the full amount. 
I was not told of this issue or given a notice of change by either TurboTax OR the IRS. It still says I’m owed $1,825 on TurboTax yet do not have it. 

Let’s get this fixed.