hoping you mean re homed, rather than released,
disturb the jill as little as possible, provide fresh meat/rabbit and fresh water daily, she will pretty much take care of the kitts, at around a week old you can try taking a peep at the kitts, sooner if you know her temprement, dont over fuss her, animals have been raising young for years without our help
get reading up as much as possible on ferret husbandry, either search old posts here, or get down the libary