Dear XXXXX XXXXX,
You can do this two ways.
If all you want to know is if you were approved you can look to find your organization in the data base here:If your organization is not listed, then you did not have an application filed or it was denied.
If you need an actual copy of the applicaion and determination, which you likel do, you can request one by following the instructions on this list. The answer to your request would tell you if you had a form completed or not.
You may want to start out by calling the IRS and stalking to the office that processes the form. They can tell you if your organization filed, that would save a step in the process.
It is not required to submit the form if the organziatin is not seeking benefits related to being a 501(c)6 organization.