The estimated refund was over $1'800 and I only got back $467. I am current on everything and would like a specific documented explanation for this enormous discrepancy.

You will be receiving a letter from the IRS to explain it.

 

 Sometimes we can make an educated guess as to the reason for your reduced refund if you mention specific amounts--for example if your refund was short by $1400---it is likely to be a mix up regarding the 3rd EIP payment.   If it is short by $1800 or  $1500 or  a multiple of that amount  ---   maybe a mixup regarding the advance child tax credit payments.   Or---the fees you were supposed to pay for using TurboTax + the "refund processing fee" charged by the third party bank….

Did you choose to have TT fees deducted from your Federal refund?  (Remember that if you did that, you also agreed to an extra refund processing fee of $39.99 or $44.99 in CA)

How can I see my TurboTax  fees?   

https://ttlc.intuit.com/questions/2565973-how-do-i-review-my-fees-in-turbotax-online

 

What is Refund Processing Service?

 

 

The IRS will send you a letter that explains why your refund was reduced.   Meanwhile it might help you to check your online IRS account.

 

 

https://www.irs.gov/payments/your-online-account

 

 

https://blog.turbotax.intuit.com/tax-refunds/why-is-my-tax-refund-not-what-i-expected-49240/

@raymond2ice 

IRS will sent you a letter.

The problem with the IRS letter is it is confusing and only lists possible reasons for the adjustment.

Not the actual reason in your situation.

IRS has issued a new instruction for what to do when you find a stimulus discrepancy.