Yes, an unconditional basic income sufficient to start everyone each month above the poverty line will most likely require more taxes in some form, BUT the amount YOUR taxes will increase is unlikely to be larger than the amount you receive in UBI, unless you're in the top 20%. 
And that's exactly what makes the most sense because it's only the top 20% that have been gaining a larger and larger share of the US economy as a result of the technological advancements that have been transforming our economy for decades. UBI should reduce 80% of tax burdens.
One of the most important things to understand about the US economy is that it pretty much stopped working for you back in ~1973, no matter how hard you may have never stopped working for it. Where is your share of our ever-rising productivity? It certainly isn't in your wages…
The growing gap between our rising productivity and your stagnant wages… that's what pays for unconditional basic income. That's where the money comes from. It's rightfully yours as your share of our rising productivity. It is your productivity dividend currently being withheld.
Your productivity dividend has been diverted elsewhere for decades. It's been diverted into the hands of those who pay for the elections of the politicians who make the laws to make sure it ends up in their hands, not yours, and stays there.
This is not fine, and it must end.
This is not fine, and it must end.
