To add new charges, click on lease from the main menu.

Select the tenant to add additional charges.

Click on more button and click on additional charges button.

Almost there just one step away to add. Click on "new" and enter the title of the charge with a price.

Pick the added charge from the select charges drop-down.

Check-in Include Tax check-box if you wish to collect a tax.

On clicking the save button the invoice will generate for this transaction.

Once done you can see the transaction table it will reflect the charges. Also, you can see the invoice by clicking the print icon.