Refund of excess paid gst due to error in advance adjustment

Theerthesh T S (6 Points)

31 July 2019  
If a person made the advance adjustment in GSTR-1 but missed to reduce the tax liability and CGST SGST shown when advance received in the FY 18-19.
There is no further output intra state supplies for the FY 19-20 to adjust the extra paid CGST and SGST. How it can taken back?