What can be done about this? One year post- aggressive lipo of stomach (Photo)

Hello and thank you for the question. These surface irregularity is likely from aggressive superficial liposuction resulting in extensive underlying scar tissue. A more even surface can be achieved by breaking down the scar tissue (using liposuction cannula) and a conservative revision liposuction. Occasionally, fat grafting could improve some of the concave areas. Best,Pejman Aflaki, M.D.Johns Hopkins-trained plastic surgeons

Dear Queensbody,
Although it's difficult to make a best recommendation based on just photos... I think your best option for a flat abdomen is a mini-abdominoplasty.  That would removed a fair about of the loose skin and pull the irregularities much tighter and smoother.  Hope this helps and good luck!