Leave the plants as they are until the foliage turns yellow and falls over. They're making blossoms for next year.

You can slip some shallow rooted annuals in between, carefully, now. The ideal way is to overseed your bulbs immediately after they're planted in fall with early blooming annuals like corn poppies, larkspur, silene and California poppies, which will bloom shortly after the daffodils fade.

Some people plant daylilies either immediately in front of or just behind daffodils.

My favorite summer annual, is Madagascar periwinkle, commonly known as Vinca. They require less watering than some others. Wait a week or two until the soil is really warm. they'll grow quickly from seeds, just scratch around between the daffodil foliage and then sprinkle the seeds on the ground. They require light to germinate.
Nell

P.S. Do you have photos of your tulips?

Here is a link that might be useful: Periwinkles Last September

Do leave the foliage or you can say goodbye to the flowers for next year. As the first poster said you must leave the foliage to yellow/brown completely or you will get no flowers next year from those plants. I plant around the bulbs but yet close to them & it seems to work good. Daylilies work really good because the foliage covers the brown foliage of the bulbs.