Up to you! If you feel like you can do more to work on them, by all means, either take the time to work on them more, or workshop them either here on the forums or via the OCR Discord server. :)
Otherwise, if you feel they're ready to go, just send me:
a WAV of your mix, in 44.1kHz, in Stereo, 16 or 24-bit, -6.0 dB, triangle dithered (if necessary). This is a pre-master, WITH NO HEAVY COMPRESSION OR A LIMITER ON THE MASTER BUS, except for any very soft compression and EQ, for warmth and tone and gluing the full track together.
If that all sounds like gobbledygook, just sending me the thing at -6dB, unmastered, is cool. :D Can send it to me on here as an attachment or GDrive / Dropbox link through private messaging, or on Discord if you add me.
There's some other submission criteria, but the TL;DR is -- as long as your mix doesn't have any weird glitches or artifacts that'll mess up mastering the track, and you give me the source name and game (or movie or whatever) you remixed it from, and give it a unique name (something that isn't the original name of the song), that's fine.