Reasons to properly close your business
The business will continue to exist if you dont properly close the business. You are still required to file tax returns monthly, quarterly and pay business permit annually. You will end up will more penalties due to open cases.
Open cases cost a lot of money. So instead of saving, you will end paying more. So by formally closing the business, you are actually saving a lot of money.
If you have an existing business, you cannot open a new one if open cases is not closed. By closing, you free yourself of all penalties and restrictions in the future.