TurboTax receives no information from the IRS after you file a tax return. Only the IRS can tell you when they will issue your refund (or in your case--the partial refund).
https://porter-law.com/irs-letter-106c-partially-disallowed-claim/
To call the IRS:IRS: 800-829-1040 hours 7 AM - 7 PM local time Mon-Fri
Listen to each menu before making the selection.
First choose your language. Press 1 for English.
Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.
Instead, press 2 for "personal income tax".
Then press 1 for "form, tax history, or payment".
Then press 3 "for all other questions."
Then press 2 "for all other questions." It should then transfer you to an agent.
Your tax return is the form you send to the government that shows your income and calculates your tax. The money the government sends back to you is your refund.
The $900 will be sent to you by whatever method you chose to receive your refund. It will be just like a regular tax refund, but for a lower amount. You don't have to do anything to get it.