Thank you for writing to Microsoft Community Forums.
I understand that you see Smart package tracking app in the address line. I’ll certainly help you with this
issue. However, we will need the details requested below:
When you say, “smart package tracking app in my address line” are you referring to the address bar of the browser?
Which browser are you using?
Are you aware of any changes made to the computer recently?
Upon researching, I found that smart package tracking is an adware that gets installed on the computer and
is added to the browsers. We can try few steps to remove it from the computer.