I have not created a K-1 before
Why not? If this is a multi-member LLC, the LLC should have filed every year it had income or expenses and issued you a K-1 each tax year it was in existence.
If this is a single-member LLC, without an election to be treated as a corporation for federal income tax purposes, then no K-1 is necessary - the LLC is treated as a disregarded entity and you would report on your Schedule C (1040).
