We want to perform our daughter's wedding at tirumala hill, want to know the process .

You are on an international site. Where is this location ? Do you not have a wedding planner ?

Hello sir, congrats for your daughters wedding. I guess you want to do some special for your daughter. You should seek blessings of lord Tirupati first with family and bride-groom. You can also seek blessings and advice of Tirumala pandits and gurus. They will guide you. If you want to perform ceremony on hills then you should seek permission from temple as well as authorities. Lord Tirupati bless you!

Tirumala appears to be a town in India. So I would contact the town officials for information.