Challenging My Auto Loan

I am interested in challenging my auto loan...How should I go about this? Can someone point me in the right direction?

Now my questions are, what happens to my car if I am successful with this?

What does this all mean for credit ratings and SSN's?

I operate a small eBay business and my Payment processor requires SSN for tax purposes...If I oppt in, does this mean I can no longer do business with anything that is part of the system?

Sorry if these are dumb questions lol I am new to this and still trying to fully wrap my head around it.

What basis?
You entered into a contract and have never told them of any deficiencies. So, if you send them a CN you still have not challenged the contract which preceded the Notice.

The State claims ownership of your car. Original Statement of Origin
The State claims ownership of your body. Birth Certificate
The State claims ownership commerce. Control of Banking by use of FRN
The State claims ownership of your children. Marriage License
The State claims you are a beneficiary of its product. SSN, Food Stamps, Disability, Medial

You can claim bondservant to the Creator and outside their system but is there evidence to the contrary , Notice and Grace and are you coming with clean hands and intent to the best of your belief? PLEASE REMEMBER THIS IS A PROCESS.

Had a win this week. Discharged 10K of Bank claims and got all negative reports expunged from three credit reporting agencies. Took three letters. Conditional Offer to Pay, Notice of Default and Failure to Cure. Not difficult.