A Hindu Undivided Family (HUF) can open a Demat and Trading account in the name of the karta (the head of the family) the process is the same as online account opening journey.
What documents are required to open a HUF Account?
To open a HUF account, you will need the following documents:
Passport-size photographs of Karta 
Pan Card of HUF & Karta 
Aadhaar Card of HUF & KARTA 
PAN No of Coparceners (At least one coparcener is required, even if the coparcener is a minor) 
List of Coparceners & Members 
Deed of declaration of HUF/ List of coparceners. 
Bank passbook /bank statement in the name of HUF (Max. 3 months Old on date of Processing) 
Bank Proof of HUF 
Income Proof of HUF (If Derivative Segment is Opted) 
To open a HUF account, please visit our branch. You may locate our branch here.