We have, in the last two years gone from a Sol Proprietorship to LLC. Why doesn't Turbotax information regarding vehicle depreciation carry over?
Sorry they don't sync or import or export to each other. You can't transfer from one into the other. 2 different programs. You will have to enter everything again into the Business program and set up the assets again.
What kind of LLC? If it is a Single Member LLC that has not elected to be an S corp you still report it on schedule C in your personal tax return.