Do you mean your SSN that you entered in MY INFO? Or the amount you entered for SS benefits from a SSA1099? If you have NOT e-filed you can make changes.
Go to MY INFO to change your own Social Security number
If you entered a SSA1099 incorrectly
Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter/edit your SSA1099.
Turbotax pick up another ss number and put on the w2, I don't know why as I copy a picture of the w2? I haven't filed yet. I think I need to start over?
ALWAYS check the information that comes in when you import or snap a photo. You do not have to start over. You can just go to that W-2 and fix the SSN by keying it in.