L.Z.
Hi K.,
I would suggest that you talk to a tax accountant, because some of your losses may be tax deductible.
If you have already paid for your business license and are not using it, you shouldn't have to pay to cancel it or to close out your LLC. I recently closed out a franchise that I sold. I was not charged to close out anything. It should be simple if you never had any employees or retail sales to report taxes on.
If you are thinking about pursuing this in the future, you can probably keep your LLC open, but you may have to pay a yearly fee and do a small amount of paperwork each year.
Best wishes to you!
:)L.