If their feed is proper (for instance game bird feed with 25+% protein and extra calcium supplied in a different bowl) and they get enough light (around 14 hours) and aren't stressed (if you moved them recently, they will most likely be a little stressed), it's just a matter of time before they start laying. I've never had coturnix, but that's what I've learned from reading this forum for months
Genetics and stress determine when your quail start laying. Either they are from a line that doesnt lay early or something is stress them out. Search the forum before asking questions like this if you want a fast answer. This has been asked a million and a half times at least.