How do I file taxes for my non profit organization

Most federally tax exempt non-profit organizations file Form 990 returns. Turbo Tax does not support the Forms 990 series in any product.

See FAQ

https://ttlc.intuit.com/community/returns-and-forms/help/does-turbotax-support-form-990-for-non-profits/00/26098

the are many types of forms for nonprofits 990, 990EZ, 990PF (private foundations)   in addition to federal filings some states also require filings.   I strongly suggest you use the services of a tax pro.  there can be substantial penalties for the late filing of the forms.