I'm not clear on whether or not you included this info in your already submitted return or if you are needing to amend your taxes to include the forgotten info. If the info was included but the forms were not, send them to the same address you filed the return at and be sure to put the primary tax payer's info in the envelope. A quick explanation to the IRS will help get those docs get reunited with your return. However, if the info was left out of your original return altogether, you will need to file an amended return. Completing and postmarking the amended return by April 18th will prevent any late payment penalties that might develop from increased taxes due.
