W7 In Person vs. Post

Hi Turbo Tax

 

I am filing my 2019 tax return, I have a SSN but my wife and 2x children require ITINs through the W7 form. I am using Turbo Tax to complete the return then printing and  have a question or two:

 

1) Should I leave SSN / ITIN Blank?

2) Can I arrange to file in person? Reason is we'd prefer not to post our family's passports. If so, what is the process - do I just book an appointment at local tax office and bring in printed documentation - will they just verify passport details and then file all forms?

Thanks Greg