On the Invoices tab you enter one row per invoice — customer, invoice date, due date, amount and anything paid. The balance, days overdue and aging bucket compute themselves against the 'As at' date you set on the Dashboard, so the whole ledger re-ages the moment you change that one date.
The Dashboard totals what you've invoiced, received and are still owed, and breaks the outstanding amount into aging buckets with in-cell bars — so you can see at a glance whether your debtors are merely late or genuinely stuck. Overdue 90+ balances flag red; anything paid turns green. Only the yellow cells accept typing; the formulas are locked.
When it's time to chase, a clean tax invoice does the talking — our free invoice generator produces one in your browser, numbered and ready to resend.