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.
What is .ASPX File Extension? What is the purpose of the .aspx file extension? The .aspx (Active Server Page Extended) file extension stores script and source codes that allow web browsers to translate and open web pages. Typically, .aspx file extensions are associated with ASP.NET by Microsoft.
As you can see by the title, ASP is an acronym for Active Server Pages. ASP is developed by Microsoft. It is not really a standard ASP is neither a real programming language nor is it a programming language, but it's a Microsoft technology that lets you use so-called scripting in your documents.