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That sort of printing is called 'duplex' printing. If you have a control in your printer's driver settings that reads, 'Duplex' or 'Duplex printing', then activate that control before sending the print job. Also, if using MS Word, be sure to set the printing controls in MS Word to duplex printing also.
Your printer model is listed as being capable of 'automatic duplex printing' (2-sided), so there should be no problem. Is it not capable of this because there is some problem or error? if so let me know please, and I will advise you.