invoicing project management timesheet INVOICING SOFTWARE The company also provides training. New for this version, the program has adopted a user interface that is similar to Outlook, multiple currency invoicing, fast timesheet entry and client request processing functions. Abak provides mid- and large-sized professional services firms with a tool to ensure accurate invoicing. Invoicing is done from a project focus. After a client is selected, a list of all services (project) performed for that client is presented. The projects that are to be included in the bill are selected and then the transactions that comprise WIP can be reviewed and edited as necessary for inclusion in the invoice. A certified Abak trainer will showcase all the different ways in which you can generate an interesting return on investment through the use of a Time and Billing solution when compared to an excel-based time-sheet entry and invoicing system. We needed help with managing employees time, productivity, expenses and invoicing accordingly because we were about to go under.