5 Smart Investing Principles The slideshow presentation that you would like to view is too large for your current screen resolution. Click here to view to view the slideshow at full resolution. Launch Presentation » Have A Question About This Topic? Name Email Address Question Thank you! Oops! Related Content Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA. How Stocks Work Understanding how a stock works is key to understanding your investments. You May Need to Make Estimated Tax Payments If… Have income that isn’t subject to tax withholding? Or insufficient withholdings? You may have to pay estimated taxes.