Regarding MIRO baseline date in payment tab

Hi all,

1) T-code: MIRO

2) Input invoice date: 'xxxxxxxx', posting date: 'xxxxxxxx', PO#xxxxxxxx and then press ENTER

After pressing ENTER, can we do some coding to the user exit or field exit whatever in order to populate the GR date (i.e. xxxxxxxx) in baseline date field but WITHOUT pressing the "Payment" tab?