Of the 3 major tax prep franchises, $100 fee may cover a standard deduction return, but it's doubtful.
There's a list of criteria to qualify for a refund loan - normally you have to have bank-product history, can't be active military, refund needs to be $1000+, Sch C can't be the only income. A credit check is automatic with the refund loan products, and that could be a double whammy.
In the event a credit report shows debt - unpaid taxes, child support, etc., the 24-hour refund is declined and the anticipated refund will pay the debt first, then fees. What $$ are left, will be paid in about two weeks.