When Submitting Files:
Ensure that the mix down is not clipping, and avoid using normalization, compressor, EQ, or limiter on the master bus (master fader).
Make sure the peaks are not louder than -6db.
Export multitrack session from your DAW as stereo wav 44.1-48 kHz 24 bit file.
Submit your demo mix or reference track for your song, if possible.
Submit Order