The Internal Revenue Service today encouraged taxpayers who work seasonal jobs or are employed part of the year to visit the Withholding Calculator and perform a “paycheck checkup.”

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The Tax Cuts and Jobs Act made changes to the tax law, including increasing the standard deduction, eliminating personal exemptions, increasing the child tax credit, limiting or discontinuing certain deductions and changing the tax rates and brackets. These changes do not affect 2017 tax returns due earlier this year, but they will affect 2018 tax returns filed next year.

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Any changes that a part-year employee makes to their withholding can affect each paycheck in a larger way than employees who work year-round.

The Withholding Calculator, a special tool on IRS.gov, can help taxpayers with part-year employment estimate their income, credits, adjustments and deductions more accurately and check if they have the right amount of tax withheld for their financial situation.

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The calculator asks about the dates of a taxpayer’s employment and accounts for a part-year employee’s shorter employment rather than assuming that their weekly tax withholding amount would be applied to a full year. The calculator makes recommendations for part-year employees accordingly. If a taxpayer has more than one part-year job, the Withholding Calculator can account for this as well. In contrast, the Form W-4 worksheets do not distinguish between part-year jobs and full-year jobs.