gkg1
Level 2

Spouse ITIN application rejected, Child ITIN granted How to amend the return

Status J1 visa (in 3rd calendar year, in the USA since 2021). Spouse and child on J2 visa (in the USA since Sep 2022).
I filed the 2023 return as "Married filing jointly" and sent the paper return with w7 forms for spouse and child. I submitted the paper application at the Tax Assistance Center myself.  Wanted to claim the child as dependent (TurboTax allowed 2000 child tax credit from the system, although I understand it is not allowed if the child does not have the SSN).


Decision: IRS rejected ITIN for the spouse but granted ITIN for the child.
The return was processed, and I received a lower refund than filed.

Question:

How do I re-apply for the spouse's ITIN? What documents will be needed?
Do i need to wait for 2024 return filing period? Or can the amendment be filed with a fresh ITIN application earlier with the documents for 2023 return?
I could not file the state return because I had to wait for the ITIN application to be processed. Will I be able to file the state return at a later time?

Thank you so much for the guidance.