The default setting for Windows is to not display a file's extension, which is the last period in a file name followed by 2 or 3 letters. Therefore, when viewing files in Windows you would only see ...

A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the ...

If you’re feeling behind or waiting on documents, a tax extension gives you extra time to file — but not to pay. In this guide, you’ll learn how to file a tax extension, which forms you need, key ...