how to file a 501c3

Do you have a W-2 or 1099 from a church?    TurboTax does not handle preparing 990 tax returns for tax-exempt organizations. 

What are you actually trying to do?

A non-profit organization can file an application to register as a 501(c)(3) organization.  We can't tell you how to do that, it has nothing to do with income taxes.  And generally, churches aren't required to register.

A non-profit must usually file a form 990 tax return.  Churches can usually file a much simplified 990-N.  We can't tell you how to do that either.

Do you want to report wages or income paid to you by a 501(c)(3)?  Or do you want to take a tax deduction for donations to a non-profit?