Answer: If you forced your paperwhites in soil rather than on a bed of moist stone, you can TRY to keep them for another round. Success with keeping them year to year is mixed, but it would be an enjoyable experiment!
After the blooms have faded, cut back the blossom stalk. Don't let it go to seed, or the plants will put energy there instead of into bulb formation. Water and feed them for a month after blooming to help them form bulbs, and after that reduce water and stop feeding. The tops will then fade. Lift the bulbs and allow them to dry. Store them in an onioin bag in a cool, dry, dark, airy place. When it comes time to plant them for forcing, plant them in a good potting soil that drains well.
Q&A Library Searching Tips