Hello! Is it possible to recognize revenue on the Start Date of a SO?

I assume this is the native Start Date field? If this date is different than the transaction date (which in your example it is) this may be better setup as a line level date field. Then you can use revenue field mapping to source the line field to the revenue element. You can look more into the Rev Rec Start Date Source options on the Revenue Rule, but since your desired start date is not SO/Invoice/Fulfillment Date, Revenue Element Start Date seems like your best option

@Sue Bhuvan - what Alex said. you also can add formula to the rev rec start date field sourcing it from the field you need.

Thank you @Alex K & @Karina!!