I’m growing my tomatoes from seed and have already potted them up to four inch pots. They are now about 10-12 inches tall and I’m going to put them up again. My questions is, when should I pinch them off?
Since we’re only a couple of weeks from setting your plants out into the ground, I’d not bother repotting them. I wouldn’t pinch them back either since that will force side growth and suckering. Not pinching will let it get taller more quickly once set outside rather than a low, bushy plant.