Problem in uploading i.tax return

IE>properties>security>custom level>include local path diractory when uploading files>enable it and check again, it will work.

I tried to do that but in the custom level settings it does not show the option to 'Include local path directory when uploading files'

Check all the option it will be after the option Drag & Drop copy paste.

You have to do this in your internet explorer, you will not find this in firefox or chrome. 

Create a folder by the name fake path in c drive and keep your .pfx & return in that profile and browse from their it wil work