If you pay at least 90 percent of what you owe, chances are good you’ll avoid the penalties (although you’ll still owe interest on what you didn’t pay). Sprintax will help you prepare an Amended Tax Return (Form 1040X), along with the corrected Form 1040NR. Simply login to your Sprintax account or register to get started. If you’ve never received a Social Security Number, you will need to apply...