Add the ability to set and bill late fees.

Under Settings > Company > Billing/Payment add a new section called "Late Fees". This section should also exist as a client group override when editing the Client Group as its own section.

Location

These settings will appear for the company and for the client group. For the company, add a new setting called Late Fees under Settings > Company > Billing/Payment. For the client group, add a new section called Late Fees.

Fields

• Late Fee Type (Percentage or Fixed)
• Late Fee Amount (Enter the percentage or fixed value)
• Late Fee Minimum (The minimum late fee to charge, if the calculated value is less then this will be used)
• Late Fee Days (Number of days the invoice is late before late fee is applied

We will have a table with the currency defined on the left, and fields associated with that currency following List all currencies active in the system.

Currency	Fee Type	Amount	Minimum
USD	Percent () Fixed	10	2
GBP	() Percent Fixed	5	1

...

Late Fee Days [======]
[x] Apply to total invoice amount (Tool tip: "If the fee type is percentage, checked this to calculate the fee based on the total amount of the invoice. If this is unchecked, the fee will be calculated based on the unpaid amount only.")

Automation Task

Add a new core automation task that will search for late invoices that should have a late fee assessed, and add the late fee. The invoice should be modified and a line item for the late fee should be added. Make sure not to add a 0 amount line item.

Add a marker, either on the invoices table or through a new table, that tracks whether a late fee has already been applied to an invoice. Ignore marked invoices when creating future late fees

Should we re-queue the invoice for delivery if a late fee is added?