If you are sending invoices to Xero, you need to set up Jobsheet admin > Xero with the correct account codes. This is because when an invoice goes from Jobsheet to Xero it takes with it account codes that Xero requires to process the invoice to payment and to track the revenue.

Jobsheet can split the account code revenue into Time and Materials (separated). This means in your reporting in Xero you can see how much revenue comes from your time, and how much from your materials.

To set up account codes go into your Xero account > settings > general settings > chart of accounts.

Please be aware your accountant would usually set these up so if you are unsure please contact them.

See the Xero website to see how this is done

Also see the article on Xero Tracking for stage 2 of the setup. Both of these steps are key to ensuring that your Jobsheet > Xero connection is doing the most it can for your reporting (and therefore your business)