You file bankruptcy most likely under Chapter 7 or 13, or possibly 11. Ch. 12 is for farmers and fisherman, Ch. 9 for governmental entities.
You can file a new case 8 years after filing before (so, now or very soon), or possibly only 6 or 4 or 2 years after, or maybe even with no delay.
Question #1 for cleaning up financially after a failed business: can the business file a bankruptcy without you? Question #2: should it?