Bankruptcy Law Questions? Ask a Bankruptcy Lawyer.
I will be happy to assist you. Your Wife can file bankruptcy individually, and all dischargeable debts in her name will be discharged, assuming she does everything according to the bankruptcy code. This does not discharge debts in their entirety. Debts that may be "co-owned" by the two of you are now your responsibility to pay back. If you have a mortgage with both your names on it, for example, she will no longer be responsible for the payment of the note, but you still would for the entire amount.
As for taxes, any refund she may get back would part of her bankruptcy estate, and this includes a joint refund. I recommend you file Married-Separate, and not ointly; this way any refund due will go to you, and not become mixed up in the bankruptcy estate