Thank you for answering the questions asked.
Following is a link to an Indiana Appeals Court case (1989) that determined “private pension benefits were not intended to be covered” by the federal exemption that protects some benefits like Social Security retirement benefits from being used to satisfy debt judgments.
https://law.justia.com/cases/indiana/court-of-appeals/1989/27a02-8712-cv-511-6.html
Once these pension benefits are paid out, they are no longer exempt - which means that any pension funds deposited in your bank accounts are vulnerable.
You should speak to an attorney (perhaps at Legal Aid) to verify, and to learn how best to proceed in the lawsuit filed against you. As an additional note, the $1800 is not a
small amount of money but it does not appear worth filing for bankruptcy over unless you have additional debts you cannot pay.
Good luck.