Let me raise a concern I just noticed hidden in your question.
"We" are closing our business" and "The business is an LLC."
Unless you meet a very specific condition, an LLC with more than one owner must file a partnership tax return form 1065, not a personal tax return with schedule C. Each partner gets a K-1 that goes on their personal return. The specific exception is that, if you live in a community property state and the only two LLC members are spouses, you file two schedule Cs, one in the name of each spouse, each reporting half the income and half the expenses.
I hope that your use of "we" was just inexact--this business is owned by only one person. If you are married, you used the word "we" incorrectly and your spouse is not an owner. If she participates materially in the conduct of the business, she is either an independent subcontractor or an employee.
If "we" means you and your spouse, and you both materially participated in the business, and you are not in a community property state (or "we" means you and any other person not your spouse), then you need to be filing form 1065 and if you have not, you need to see an accountant right away. The penalty for failing to file form 1065 is $195 per month per partner from the date it was due.
