Where you edit your deposit depends on which kind of deposit you have set up.
If you've configured a "yearly" deposit (i.e. paid once per year, on the very first enrollment), navigate to your Admin settings and select Step 8 of the Campers Setup Wizard. Then, click "Yearly Deposit" on the left. To learn more, click here.
If you've configured deposits on your enrollment bundles (so that campers pay a minimum amount per enrollment option), navigate to your Admin settings and select Step 9 of the Campers Setup Wizard. Find and expand the relevant enrollment option, then click directly on the current deposit setting. To learn more, click here.