How can I make my stomach flat? (Photo)

Dear Creative353812,
it is hard to tell for sure without an examination. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

From the photos alone it appears you would benefit from a tummy tuck. The contour that you are presenting is typically improved from repair of the underlying muscles and should get your that flatter tummy. As an in person evaluation is best, you may want to visit another board certified plastic surgeon for a second opinion.