I would be careful not to overfeed the tomatoes. Too much fertilizer, nitrogen in particular will cause the plant to grow leaves and not much fruit.
I usually do 1/2 cup fertilizer in the planting hole, relatively low nitrogen. ratio of 1:2:2 plus micros. I use citrus fertilizer for just about everything because it contains micros.
At first flowering I will feed each plant about a tablespoon of balanced fertilize. I repeat fertilizing again when the fruits are half grown and monthly thereafter. My tomatoes are in pots.
If you are planting in the ground, it is easier to get a soil test before you plant. That way you would have a recommendation for what you need.
If not, I would go with how the plant looks. If it is growing vigorously with thick stems and large green leaves and starts to flower at about 3 ft for most plants. You have more than enough fertilizer.
If your plants grow vigorously, have lots of leaves and are very tall. Then you could probably have used less nitrogen, unless you like tall plants. (I do).
If the leaves are a healthy green and not yellow or chloritic and the fruits are well formed then you are giving the plants enough fertilizer.
If the plants have lots of leaves are very tall and not much flowering has occurred, you have given it too much fertilizer.
If the plant looks stunted, the leaves yellow, purple or have chlorosis then you have not fed it enough or it could be a disease causing the problem.
I think from what you have said, you have enough fertilizer and should not need too much more.
Organic fertilizers have lower numbers, but except for the fish emulsion, most organic fertilizers release nutrients slowly so it is best to have them in the soil before you plant.