As per your description, stains of tea or coffee can be removed with scaling ( cleaning). However, if you want to whiten your teeth , teeth whitening ( bleaching) treatment is recommended.
Duration of treatment:
Scaling – It is a single day procedure which will take 30 minutes.
Bleaching – it is also one day procedure and that will take one hour.
Cost of treatments:
Scaling – INR 500 to 1000 depending on stains.
Bleaching – INR 900 to 1400 per tooth depending on materials.
We can guide you appropriately if you can send us picture of your teeth in which stains should be visible.