I receive a W2. My wife does not receive a w2. I also have business. Wife helps with business. Child in daycare. Can I deduct child care expenses?

I have a full-time job for which I receive a W2.  My wife does not receive a W2.  I also have a small business that I run from the house.  My wife helps out with that business.  As a result we have our 4 year old in daycare.  Can I deduct the child care expenses and, if so, how?