How much watering for tomatoes?

My leaves are slightly brown on the edges and im led to believe im over watering my toms as im watering them daily  after a read on google i think thats the case but any thoughts peeps? 

Ta Lee

Are they on a windowsill?  It may be that they are suffering from scorch.  If they are too close to the glass, or worse touching it, the sun is magnified slightly and dries off the extremities.  It is usually worst on the lower most leaves.  

Extra watering won't help.

What sized pots are they in, it sounds like you need to pot them on to dry them out a bit. If the seedlings are sitting in cold soggy compost they'll be very unhappy and won't make roots.

If your plants are only 2'' tall and you are watering daily, you are giving them far, far, too much water. At this stage tomato plants should be kept just moist, not soaking wet!  Otherwise you will end up with tall leggy plants, and the first flower truss will be 2 foot up the stem.  Plants need to establish a good root system before putting on top growth and they do that by seeking out moisture.  
After the final planting and when the first fruit has set, then you can go full pelt with the watering!  Happy gardening!