I just hit 500 units of my own serum sold this quarter

Yeah, that tax moment is the real wake-up call. For me, the big shift was getting a simple inventory sheet going, just a Google doc at first. I tracked every batch number, when I made it, and when it sold. That stopped me from running out of my base oils mid-month. Then I had to figure out shipping in bulk, buying mailers by the hundred instead of running to the post office for ten at a time.