If you do not want sales for services (rather than goods) to a EC customer to appear in box 8 on your VAT return, you will first need to check that you have a tick in the box for “Let me set on a per-nominal basis which codes should be included as EC sales for VAT purposes” which is found by going to Settings> Advanced Settings.
you can go to Invoices ->Sales Codes, select the sales code you want, and disable the box labelled ‘Include sales of this code to customers in other EC states in Box 8 of my VAT return‘->Update
If disabled, the sales of this type to the customer in other EC Member State will not be included on Box 8 of your VAT return.
To include the sales type on EC Sales List, tick the next box ‘Include sales of this code to customers in other EC states on my EC Sales List’