Tomato plants only need a deep watering every 2 to 3 days or once or twice per week depending on how hot is outside.
When the soil to the tomato plant gets dry then it's time to water the tomato plants again.
A good rule of thumb when watering tomato plants is to water the tomato plants at least once per week and give each tomato plant at least 1 gallon of water.
Over watering the tomato plants can cause them to die so only water them when needed.
Watering the tomato plants daily can cause the tomato plants roots to rot which can then lead to the tomato plant dying.