I have never used Taxpayer Advocate Service. I did go to the IRS webpage to see what I could find for you. I'm linking you to the specific "Expedite A Refund" section that I got to after clicking on several links. Maybe this will help.
https://taxpayeradvocate.irs.gov/get-help/expediting-a-refund
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
