Can not find "Save and open" script

Hello,

I have created two fields in CustomerQuote.xbo, TaxNumber1 and VAT Number. I wrote a script that is EV. before save for cheking if taxnumber1 is duplicated or no. and it works,

But, this script is not working when I click "Save and Open"

also I can not see any event with the name of Save and Open.

Does anybody know what can I do?

Regards

Sepide