Q.I’m Growing A Tomato Plant And Its Looking Good. When Do I Trim The Leaves? How Will Know When The Plant Will Have Tomatoes?
My tomato plant is about 3-4 feet it has a very thick stem red and also have 2 other littles ones beside it. It looks great. She has a lot of leaves do I cut them off?

Certified GKH Gardening Expert
This section should tell you all you need to know about tomatoes. It includes "Should You Prune Tomatoes?" (You can prune the suckers at the joints) You can watch for tomatoes after it flowers.
https://www.gardeningknowhow.com/edible/vegetables/tomato/growing-tomatoes-guide.htm