What type of citrus tree is this?
Unfortunately, I am unable to identify citrus by the leaf and/or flower. I will send it to someone else in hopes that they can help you.
Most likely, this plant is a sweet orange or navel orange. But it could also be a mandarin, possibly a satsuma. Many citrus look similar from foliage and flowers, so there is going to be some uncertainty without a DNA test or waiting on fruit to mature. You should have your answer in about 8-9 months when the fruit matures.