How will people know you are an e-file provider
Once you register with the IRS to provide electronic filing services your business will be listed publicly as a Authorized e-file provider. The IRS has a tool that provides a look-up search for taxpayers seeking out e-file providers at: http://www.irs.gov/efile/page/0,,id=10162,00.html. Once you are registered and are accepted you are in!