No it won’t, but it will increase your odds a bit. The only really reliable ways to pass the test that I know of are described here.
Qcarbo20 is a same day detox drink that attempts to mask the toxins inside you temporarily, which is only effective if toxin levels are really low to begin with (a reason why so many people fail their tests when using just Qcarbo). Combine it with a Toxin Rid course in advance however, and you should be alright.
More thorough info on how to best get clean through detoxification quicly can be found here.
If you want to use Qcarbo as your same day detox drink, the 32oz is the better option while not costing you too much extra compared to the 20 oz.
What’s your Herbal Clean Qcarbo20 review?