Please upload your files to Bullfinch via this button:

Please send to us 320 kb/s Mp3 file or Wave 16 bit file with limiting to -8 or -10 LUFS

Please send to us Wave file 24 (or 32) bit with headroom about - 6db.
Please don’t use any processing  on master channel.
Also, please send at least one reference track which you like.
We will send you a free copy of your mastered track ASAP. Turnaround speed: 2-3 business days.

Please send to us Wave files 24 (or 32) bit with headroom about - 6db as separate group tracks, like:
DRUMS
LEADS
PADS
BASS
VOX
FX
etc.

You can check this video if you are not completely sure what to do

Please send to us Wave files 24 (or 32) bit with headroom about - 6db per channel separately, like:
KICK
BASS MID
BASS SUB
CLAP HI
CLAP MID
PLUCKS
etc.

Note: you can group similar instruments  or audio files like: FX, HATS, CLAPS, PADS, etc. in one channel, to decrease number of stems

You can check this video if you are not completely sure what to do: