Even though the Internal Revenue Service no longer mails out income tax forms or instructions, they still expect us to mail them a completed return by Monday. Here is a link to the IRS website, which provides a wealth of information. While you can request an extension of time to file, you still need to pay tax on time.
The California Franchise Tax Board is here. For other states, try www.state.??.us (replacing the question marks with the postal abbreviation for the state you need) or Google __ state income tax, inserting the name of your state.
The Pew Research study on Americans and taxes is here: A Third of Americans Say They Like Doing Their Income Taxes.
An aside: Tax Day Freebies