I am in financial hardship, and need to use part of my 401k to pay off a loan. What will the taxes/fees look like being that I'm under 59 1/2 years old and single?

Perhaps this may help.

Please read TurboTax FAQ for more information about “What are the exceptions to the penalty for an early withdrawal from my 401(k)?”: https://ttlc.intuit.com/replies/5881082

Please read TurboTax FAQ for more information about “Can I make a hardship withdrawal from my 401(k)?”: https://ttlc.intuit.com/replies/3302066