Borrowed 14k from a relative in 2015 (with full-fledged notarized promissory note) to start a 501(c)(3) thrift business.
That means IRS Form 990 would have been filed with the IRS for tax years 2015, 2016, 2017 and 2018. FYI for others reading this thread, TurboTax does not provide or support that form. So you can't use TurboTax to file a tax return for a 501(c)3 at all.
In 2018 I had to pay back the 14k, but with my 100% of my personal monies
Depending on how the 501(c)3 is set up and structured, can *you* make a tax deductible donation to the organization? If so, then if your 501(c) is registered as a 50% organization you can deduct 50% of your donation from your taxable income. If a 30% organization, then you can deduct 30% of the donation.
Then you let the 501(c)3 pay back the borrowed money. Hey, a 50% or 30% deduction is better than zero percent, right?
I would suggest you get with a tax professional on this. BTW, the IRS Form 990 is late for 2018 (assuming you haven't filed it yet) Assuming you set up the organization on a calendar year, it was due May 15th, 2019. For information on due dates, extensions and potential penalties, see https://www.irs.gov/charities-non-profits/annual-exempt-organization-return-due-date
