I'm a bit confused by your description of your business relationship, but I will try to cover the possibilities.
There are estate trusts and business trusts. A business trust legally formed under state law is a separate legal entity, and must file either Chapter 7
or 11. Bankr. Code
§ 101(41). (An estate trust cannot file bankruptcy under any Chapter, because the trust is neither a legal entity, nor even a legal person.
If you have a business trust, then you need a lawyer -- otherwise you cannot file bankruptcy. If you have an estate trust, you cannot file bankruptcy, whether or not you have a lawyer.
If you are the owner of a small business and you are personally liable for the business' debts, then you can file personal
Chapter 7, 11, or 13 (i.e., in your own name), without a lawyer, and then schedule all of the debts of the business.
Hope this helps.