An ITIN (Individual Taxpayer Identification Number, sometimes called a PIN, Tax ID or Taxpayer ID) will serve as your identification number for filing your tax returns. If you do not qualify for an SSN, you will need to apply for an ITIN.
Active Server Page Extended ASP.NET script. An aspx file extension is associated with Active Server Page Extended format used by Internet Information Services (IIS) web server with server side scripting language ASP.NET used to dynamically generate websites. Generated output from an .aspx page in your browser is common html page.
Did someone email you a ASPX file and you're not sure how to open it? Maybe you have found a ASPX file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a ASPX file related error message. Before you can open a ASPX file, you'll need to figure out what kind of file the ASPX file extension refers to. Tip: Incorrect ASPX file association errors can be a symptom of other underlying issues within your Windows operating system.