Before troubleshooting, make sure you have a compatible printer, correct printer settings, and enough paper.

1. Check that the printer is compatible with double-sided printing.
2. Navigate to the printer settings and make sure double-sided printing is enabled.
3. Check the printer paper tray to make sure there is enough paper.
4. Restart the printer to update the settings.
5. Print an additional test page to confirm double-sided printing is successful.