Oregon State Kicker

I filed married joint last year, this year I am filing single.  The Oregon State TurboTax return asks for 2020's state Line 22 "Total taxes before credit" in order to calculate the Oregon State Kicker refund for 2020, but this is JOINT Total taxes before credit.  Using this amount will give me the entire Kicker amount due me and my ex-husband.  Do I file for both of us and share the refund?  Or is there a way for me to claim my portion and he claim his on his own filing?  Thank you!