Hi we are a small business and we need help. We need an organization system to file the invoices we get back signed from the customers. We get anywhere from 80 to 100 invoices daily, how can we sort it our properly and effective?

The customer sends the check paying those invoices at the end of the month. We have to look for those invoices in there account and post payment.

Invoices are typically filed alphabetically by customer name. In your case, you would also want to group them within the customer file by date to facilitate the end of month payment. Sometimes there is also a numerical invoice file created, but not really necessary if your accounting software allows you to search by number.