Oct. 15 is the tax filing deadline for people who requested an extension Written By Written by Contributor, Buy Side E. Napoletano is a contributor to Buy Side and an expert on student loans, taxes ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Lea Uradu, J.D., is a Maryland state registered tax preparer, state-certified notary public, ...

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 ...