Service Item appears here. You cannot change this.

This box displays the net value for the current service item. It is calculated by multiplying the Qty/Hours by the net unit price (including any discount). You cannot edit this figure.

The details that you have entered in the Service Invoice/Credit Note window appear here. You can edit the information as required.

This box shows the amount of VAT calculated for this item according to the default VAT code from the Product Record. If you have selected the Override Product Tax Code in Invoicing check box on the Customer Record, the customer's default tax code is used to calculate the VAT.
You can only edit this value if you have selected the Item VAT Amendable check box in the Company Preferences option from the Settings menu.

Enter a quantity of service items or the number of hours worked here.

The nominal code taken from the product record appears here automatically. You can change this if required. If you have used a special product code, the nominal code as shown on the customer record is used.
You can analyse your invoice/credit note to the nominal ledger in two ways. You can either analyse each item of the invoice/credit note to an appropriate nominal account, or treat the whole invoice/credit note as one posting to the nominal ledger.
If you want individual items on the invoice/credit note to be transferred separately to the nominal ledger, then you need to include a nominal code entry for every item on the invoice/credit note. You can amend the default nominal code if required. If you are not sure which nominal codes are available, use the Finder to display a list of possible nominal accounts from which you may select.
If you want to analyse the whole invoice/credit note to just one code, any code entered in this box will be overwritten by the entry you make for Nominal Account in the global area of the Footer Details tab. If you analyse your invoice/credit note to one nominal account, only one line will appear on the audit trail for this invoice/credit note.

Enter the unit price for the service. If you charge by the hour, this would be the unit price per hour. If you enter the gross amount here, click Calc. Net to split the gross into the net and VAT amounts.

This is the default tax code for the product. If you have selected the Override Product Tax Code in Invoicing check box on the Customer Record, the customer's default tax code appears here.
Like the nominal code described above, you can either analyse each line of the invoice/credit note to its appropriate VAT code, or you can analyse the whole invoice/credit note to just one VAT code. You can only analyse it to one VAT code if you are also analysing the invoice/credit note to one nominal code.
If you want to analyse each line of the invoice/credit note separately, select the VAT code you require from the drop-down list.
If you want to analyse the whole invoice/credit note to just one VAT code, any code entered in this box will be overwritten by the entry you make for Tax Code in the global area of the Footer Details tab. If you analyse your invoice/credit note to one code, only one line will appear on the audit trail for this invoice/credit note.

The discount entered here is the total percentage of discount which the customer receives, as set up on the Customer Record Defaults. You can amend this if you wish.
To see a breakdown of how this discount is made up for this item, click Discounts. The Discount Breakdown window appears.

This is the default department for the product.
Like the nominal and tax codes, department numbers can be entered by line item or for the invoice/credit note transaction as a whole. You can only analyse the whole invoice to one department if you are also analysing it to one nominal code.
If you want to analyse the invoice across departments for each line item, then each item must have its own department number. You may amend this department number if necessary.
If you want to analyse the entire invoice/credit note to one department number, any department entered here will be overwritten by the entry you make for Department in the global area of the Footer Details tab.
If your product item is a non-product item S2 or M, the Product Item Line window only provides those boxes that are appropriate to that type of item.
For no-charge product items (code M) an Item Line Message window appears letting you add a description and two lines of comments.
For S2 product items, the Product Item Line window appears but the Tax Code of T0 cannot be changed.

This shows the value of the discount that the customer receives based on the discount percentage.

If your Sage Line 50 program is integrated with Sage Job Costing, and you have posted this invoice/credit note into Sage Line 50 from Job Costing, the job reference appears for you automatically.
If your Sage Line 50 program is not integrated with Job Costing or if you have entered the invoice/credit note directly into Sage Line 50 you can use this box to enter a reference of your own.