If I file the dissolution, can I register the same name with sole prop?

This question has nothing to do with debt resolution and should be directed to a business/tax attorney. Every state has a business corporation law which discusses how a business' affairs are wound up if the company wishes to cease doing business. A certificate of dissolution must be filed with the Secretary of State's office in the state where the business was organized or doing business. If you wish to continue doing business in anything other than your own name (i.e., as in Joe Smith d/b/a Vacations 'R' Us"), there is a requirement that you register the fictitious name. It could be filed in the county register of deeds or court's office. Again, consult with a business law attorney in the state where you conducted business. If you have any tax issues, consult with your CPA or a tax attorney. If the LLC had its own tax id number, then something may have to be filed with the IRS or state revenue department. If it was under your own social security number, nothing should change except that you would now file any schedules required of sole proprietors.