Access Database

I am working on a software inventory database. I have run into a major problem.

I do not know how to set it up that I can enter in 1 software type with more then one license key. I have my main software table then there is a license table with. The license table has the softwareID and the License key. The SoftwareID has a one to many relationship with the Software table…

I am teaching myself access…. So any help would be appreciated.

*edit: I would just have a single box that can add several keys, but I really want it to look professional… Like have an add license button or something like that.