@scottaisd00 hi, i imagine there is an easier way to do this but could you refund the payment and then create a cash purchase for the refunded amount.  The cash purchase should allow you to print a check.  You may need to extend the customer as a vendor as well.  

looking through the community portal, it looks like there may be a free customization from Github that you can publish to print refund checks (I would recommend testing this in a sandbox prior to publishing in your production environment) but here’s the post in case it helps!

@scottaisd00 

See this open source package on Acumatica’s github.

GitHub - Acumatica/PrintCustomerRefundPkg: Acumatica - Print Customer Refund Check Customization

John