5 1/2 month old puppy potty trained but looks at me or my spouse and urinates on the carpet in front of us why?

Potty trained? I hope you mean outside and not on a pad. Those are for training only, not regular use. Please use answer to say how often you take him out.

How long have you had the puppy?

How long has he been potty trained?

How long has this been going on?

Any changes in the household?

Have you taken him to a vet to rule out an infection or other medical issues?