Thanks for your reply; I will wait then.
A brief story of why this happened and might help other filers: my wife doesn’t have ITIN; we plan to apply for one together with this return. When filing the return in TurboTax, I left SSN/ITIN field for my wife empty. Only after submitting the Return (together with ITIN application) did I realize TurboTax assumed my wife has SSN, hence claiming EITC in the return. After I get my wife's ITIN, I redo the Return again in Turbotax, which results in a lower refund due to no EITC.
