Tada is well connected to Chennai via local trains and mofussil buses that head to Chennai from Tirupathi and Nellore.
By Train
Trains from Chennai heading to Sullurpeta from Chennai Central pass via Tada. There is a train every two hours and the last train from Tada to Chennai leaves at 8:30 pm.
By Car
To reach Tada, Cross the Padi junction in Chennai and take the redhills route and join NH-5. Drive for about 60Kms and you will reach Tada town. Before you reach Tada you will cross the AP checkpost. If you are taking taxis, then you will have to shell out permit tax here Rs.250 for Indica and Ambassador and it is pretty high for a Tata Sumo or Tempo Traveller. It might be cost effective to take 2 Indica's compared to a Tata Sumo.
Once you reach Tada, take the left which is right next to the bridge and you will reach Varadiah Palem. Ask the people for directions from here. You have to take a left turn to reach Tada falls and there are absolutely no indications at this point. You can reach this place from Kalahasti too.