What is a major financial pitfall for individuals holding two W-2 jobs if they do not manage administrative tasks correctly?

Answer

Owing a significant amount of tax at year-end due to insufficient withholding.

When both jobs are W-2, failing to adjust W-4 forms means neither employer accounts for the income from the other job, leading to under-withholding throughout the year.

What is a major financial pitfall for individuals holding two W-2 jobs if they do not manage administrative tasks correctly?
jobemploymentcareerwork