Applying for the current generation of refund loans with HRB, JH, etc. is *NOT* filing your tax return, unlike the RALs of old; the IRS has made it clear you CANNOT legally file from a paystub. If you didn't qualify for a loan and didn't file there with a W-2 or 1099, you are under no obligation to file there and you're free to file with TurboTax.
Other answers say JH doesn't require you to file with them even if you DO get a loan, though you'll have to repay MetaBank for the loan. (It's officially interest-free, but JH pays MetaBank to offer them; that's one reason why their fees are so high now.) That may not be true of other tax preparers; check the terms of your loan contract or call them.
