Thanks.
I have submitted my tax return file (1040) and W7 (ITIN application) successfully on Oct 3, 2025 by making appointment and visiting IRS TAC (Taxpayer assistance center).
Based on the TAC staffs comments, as long as I submit my W7 and 1040 before the due date (Oct 15, 2025), IRS will consider that my tax return file is valid to claim for ODC (Other Dependents Credit), although it will take at least 7 weeks for W7 to be approved (which means the W7 ITIN approval date will be surely after the due date Oct 15, 2025).
Anyone with similar situation can refer to my case.
