Hi, I need to change the posting period of a voided Bill Payment. Can you please help me with this?

You need to delete the bill payment ( the voiding journal is delete too) and recreate the same bill payment ( don’t forget to update the numbering of your bill Payment ) . Then you can click to void on the bill and select a posting period for the new voiding journal

@Marc Thank you for your kindly help! It worked as you said.