In the Connections tab, ensure you have connections with both Dashpivot & Xero

Select the Flows tab at the top & click Create Flow under Xero
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Select 'Populate Xero Timesheets with data from Dashpivot'

Configure the flow by adding a flow name, linking it to the relevant template ID and mapping the relevant fields to the appropriate options from Xero
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Click Add to add more sources from Dashpivot to link with Xero (you can click Remove on the right hand-side to remove that link)

Once you've finished, click Save