When you first add a invoice you need to select the Supplier.
Invoice Number - Invoice number from the supplier
Inv Date - Date on the supplier invoice
Net - Net Amount shown on the invoice
Tax - Tax amount shown on the invoice
Gross - Gross shown on the invoice.
Tax Code - Tax code for Sage.
Red Area
This area "Estimated Costs" shows a list of outstanding costs for this supplier. You can use the find button if the job still isn't showing. Highlight the line you wish to pass and click on Pass.
Yellow Area
This area will show a lists of costs on the invoice. Totals will show to help you with allocating many jobs to one invoice.
You can use the apportion button if you wish to split a invoice over many jobs, this can be done by Weight, Value or evenly.
Returning costs if done in error.
If you select a cost in error and its in the Yellow Area "Costs on this Invoice" you will need to return this to the listing in the Red Area "Estimated Costs". Click on Job Find and type in the job ref of the job. The job will be shown in the Red Area and click on the Pass button to remove the costing from this invoice and free that charge line back up for another invoice.