Filing as a nonprofit requires approval of nonprofit status by filing Form 1023 with the IRS. TurboTax does not support any non-profit forms. Here is the link for a do-it-yourself preparation and filing of Form 1023-EZ
https://www.pay.gov/public/form/start/62759871
There are also numerous websites that can do this. Use at your own risk. Until then you may have a for profit partnership which would require filing form 1065. There is also the possibility it's operating as a hobby. As a hobby, income is taxable, but expenses are not deductible.
see this webpage from the IRS as to hobby.
https://www.irs.gov/pub/irs-news/fs-08-23.pdf
