I am working with a client who is a US citizen with a spouse who applied for a US Visa and SSN. The processing time of the application is 6 months. We cannot file the return or extention without the SSN. Any advice? I have called the SSA and IRS and read through multiple IRS publications without a definitive answer. I see there is an "applied for" option in ProConnect where you enter the SSN. Can you file an extention with that? Thanks!