User can take extra amount from the student other then the fee plan heads amount.

Step 1 - Go to the Fee Heads form of the Fee Module and create a head with Extra Fee type 

Step 2 - Search the student on the Fee Deposits form and select the detail 

Step 3 - Select Mode as Extra Fee 

Step 4 - Enter the amount in particular head  

Step 5 - Select the mode of payment and deposit the fee