Where can one find information on IRS Roth IRAs?

You can find information of Roth IRAs on the official IRS website. There you will find information about how a Roth IRA is different from a traditional IRA, and the rules that apply to a Roth IRA. For more detailed information, there is a website called RothIRA, which is the complete guide to Roth IRAs; it has information about what a Roth IRA is, how to get started, and more.