Changing report associated with a table

I hope someone can help me here. I want to change the standard Sales Invoice (206) layout considerably, and rather than replace the existing object, I was planning to create a new bespoke object. However, I can’t quite work out where a report is associated with a given table, so that when I Post & Print, the new layout is used. I’ve discovered Print Function in the Sales Invoice Header table, but can’t spot a link to the report. Alternatively, I’ll need to replace the original report 206 with my new version TIA

You can go to the sales & Receivable | Setup | Report Selections Sales, Select the Usage as Invoice and Enter the Report you want to run. You can even define more than one report to run, if you want to. Naveen Jain

Perfect, thank you very much.