can't do automatic double sided printing

[Nita36]

My Envy4520 printer used to do automatic double sided printing, without me having to take the printed sheets, and re-enter them in the tray.Don't know why it stopped, but  I can't get it back to doing that. CUSTOMER SERVICE PHONE NUMBER, please?

[Elohi_NR]

Hi @Nita36,

Welcome to the HP Support Community. 

I'd like to help!

This seems to be an issue with the printer drivers. I'd suggest we try a root level re-install. Let's get straight into this -

Step 1 Download and run HP Print and Scan Doctor from here.

Step 2 Re-install the printer drivers -
1) In the search box, type and open "Uninstall a Program". 
2) Look for HP Printer software. 
3) Right-click to uninstall. 
4) In the search box, type and open “Devices and printers”. 
5) In the Devices and Printers, look for your HP printer. If you see it listed right-click on it and choose “Delete” or “Remove Device”. 
6) Open the run command with the "Windows key + R" key combo.  
7) Type printui.exe /s and click Ok. (Note: there is a space in between “printui.exe” and “/s”). 
😎 Click on the "Drivers" tab. 
9) Look for HP Printer driver. If you see it Click on it and click “Remove” at the bottom. 
10) Select Ok. 
11) Select Apply and Ok on the Print Server Properties windows. 
12) Close Devices and Printers Once the software and drivers are removed. 
13) Restart the computer. 

14) Download and install the software and drivers from here.

Let me know how that goes.

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