Am I correct in assuming that I cannot use TurboTax if my spouse lacks an ITIN?

My wife and I are residents of the US for tax purposes (though we're both here on non-immigrant visas). I have a work visa (hence SSN), she does not. This is our first tax return since marriage.

TurboTax won't let me continue without entering an ITIN for my wife. I'm told on the forums and various help pages that I should get an ITIN and THEN prepare my tax return with TurboTax, filing for an extension if necessary.

However, according to the instructions for form W-7 (the form for getting an ITIN: https://www.irs.gov/pub/irs-pdf/iw7.pdf), on pages 3 and 4, we're required to send in the form W-7 WITH THE COMPLETED TAX RETURN, WITH SSN/ITIN FIELDS LEFT BLANK.

So is there a way to complete a tax return with TurboTax without filling in my wife's ITIN, as the IRS requires? Or should I just give up on using TurboTax?