Your tax return reports all income, from all sources, for the year. You would not have to make any adjustments on your return. Both W-2s should be reported and accounted for on the return.
Often, with multiple jobs/types of income, your withholdings may not be sufficient to offset your tax liability, leading to a balance due with the return.
You can update your W-4(s) to account for multiple jobs, etc. These articles and calculators are helpful to accomplish this:
IRS Withholding Calculator
What Is a W-4 Form?
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