Hi PMUser01,
Thank you for using the Support Forum. Please take a look at the supported paper sizes and types for 2-sided printing. It does not look like the size you are wanting to use is supported. For additional information please consider contacting your support centre for further assistance.
We have a custom form 8x8 that prints on both sides and bleeds to the edges. We want to load the forms in Tray 1 and print duplex. Tray 1 will only print duplex with 8 1/2 x 11 paper. We can only duplex the custom forms from the document feeder. Any suggestions?