> That has nothing to do with my day-to-day location.
In some US states (and some international jurisdictions, as well) you owe income and possibly other taxes (and your employer may be responsible for withholding and reporting related to those taxes) on income from work done in the jurisdiction even if it is only a single day of work, and even if you are not a tax resident, so, yes, it has something to do with your day-to-day location.
In some US states (and some international jurisdictions, as well) you owe income and possibly other taxes (and your employer may be responsible for withholding and reporting related to those taxes) on income from work done in the jurisdiction even if it is only a single day of work, and even if you are not a tax resident, so, yes, it has something to do with your day-to-day location.