Financial Software Questions? Ask IT Support for Answers ASAP
Your post does not indicate what preparation program you were using but if it is TurboTax (most people seem to have problem with them) then you need to click File near the top right area of your screen, and keep following the on-screen instructions until you've clicked the Transmit my returns now or Transmit Returns Now button.
You must click that button to electronically send your return to the government.
Once you've done that, the next thing you should see is a Transmission Successful screen. This means your return is on its way to the government agency.
Your e-filed return will remain in pending status until the government either accepts or rejects it.