A person who enters through the process you describe is only permitted to be in the US
for 6 months at a time. The number of entries permitted in any given year is determined solely by the officer at the port of entry. If they decide to let you back in the next day after leaving, they can do so. But this is unlikely to happen, since spending more than 6 months in the US can be viewed as taking up residence here.
But this has nothing to do with tax laws, and to be honest, we are not permitted to provide this information, since you are in the US immigration section.
If you are not earning any income
while in the US, you should not be subject to US tax laws.
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