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Bulbs will not keep until fall so you can pot them up or plant them now and hope for the best. If they are hybrid tulips which are often treated as annuals, toss them out. Species tulips are hardier. Much depends on how the bulbs were stored and what condition they are in now. If they feel papery and partially dried out, soak them in warm water for several hours prior to planting. If there is any softness, as in rot, throw them out. Only time will tell if they will perform; they may be too depleted to bloom this year. I would use a balanced water-soluble fertilizer every 2 weeks to help them along.

Are your daffodils getting enough sun (at least 6 hours of direct sunlight)? Are they planted at the correct depth? If planted too shallowly, flopping is a problem. Daffodils are generally planted so the tip of the bulb is about 6 inches down. Over-fertilization causes excessive green growth and long, weak stems.

This is curious since daffodils are quite hardy. I suspect that either the winter was unusually wet, especially if your soil is heavy, and they rotted or an animal used them as food. Other possibilities are that they are overly crowded and need to be dug up and divided and that they failed to replenish the bulb because foliage was cut back too soon. Every year you cut them back a bit early- that is before they turn fully yellow, you are cheating the bulb of what it needs to survive the winter and send up shoots the next spring. It is also wise not to plant daffodils where you have flowers or shrubs that need a lot of supplemental watering. If you dig up the clump, you can probably figure out which of these problems affected your daffodils. When replanting, make sure the bulb tip is planted 6-8 inches down, or roughly 3 times the length of the bulb.

IF they are rotted, then there will be no way to save them. Can you include a photo so that I may see how far they are rotted?

This article will give you proper storage methods, so that this is prevented in the future: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/curing-daffodil-bulbs.htm

You will want to wait until they begin dying back for the year. This is when they can be transplanted without harming them. Here is an article for more information: https://www.gardeningknowhow.com/ornamental/bulbs/daffodil/dividing-daffodil-bulbs.htm

It is possible to dig and transplant daffodils in spring, preferably just after flowering, but it's best to replant them immediately, so I think re-potting them is a good plan. That way, they'll stay healthy and will be ready to sell in May.