You can enter temporary scores into the ‘Test Scores’ section of the application if you have taken the test but have not received your scores. If you haven’t taken the test, you must enter zeros in all required fields for the GMAT.
For the GRE, you must enter 130 in the required score section and zero in the required percentage section. You can explain your circumstances further in the “Additional Information” section and provide new information on your application once you receive your scores.