Tax Day is approaching, and soon it will be time to begin assembling forms. If you haven't looked at them yet, all those numbers and letters – W-2, W-9, 1099 – can easily overwhelm you.

Your W-2 form, or Wage and Tax Statement, helps you to fill out your annual tax return. Here's more on how to understand the form and what to do if it’s wrong. Many, or all, of the products ...