What type of tax returns are required for a non-profit corporation that doesn't have 501(c)(3) status?

What type of tax returns are required for a non-profit corporation that doesn't have 501(c)(3) status?
To limit liability, I have suggested that a group with which I am involved register with the state as a non-profit corporation. Going through the complications of 501(c)(3) status isn't important for us. We don't have employees, or any assets other than, potentially, a bank account. The main objection is that we would have to file a tax return. I doubt this would be terribly involved. I can't get an answer on what type of tax return we would need to use. Would we use one for a regular corporate tax return since we're not a 501(c)(3)? How complicated are these returns? We probably bring in $5,000 or less per year from donations and fundraisers. To limit liability, I have suggested that a group with which I am involved register with the state as a non-profit corporation. Going through the complications of 501(c)(3) status isn't important for us. We don't have employees, or any assets other than, potentially, a bank account. The main objection is that we would have to file a tax return. I doubt this would be terribly involved. I can't get an answer on what type of tax return we would need to use. Would we use one for a regular corporate tax return since we're not a 501(c)(3)? How complicated are these returns? We probably bring in $5,000 or less per year from donations and fundraisers. And yes, donors know it's not tax deductible. That's not our concern. 990 EZ applies only if we have 501(c)(3) status I think. And yes, donors know that their contributions are not tax deductible. I posted the question here because when I called the IRS's non-profit number, I got a message saying that due to high call volume, no one was available to take the call. Apparently they don't have a system for keeping you on hold until the next available representative can take the call, or they are soooo backed up that no one would be available to take the call for such a long time that they kick you off instead.