IR-2018-165, Aug. 14, 2018 Español

WASHINGTON — The Internal Revenue Service today urged high-income taxpayers and those with complex tax returns to check their withholding soon to avoid an unexpected tax bill or penalty when they file their 2018 federal income tax return in 2019.

The Tax Cuts and Jobs Act, the tax reform legislation passed in December, made major changes to the tax law, including increasing the standard deduction, removing personal exemptions, increasing the Child Tax Credit, limiting or discontinuing certain deductions and changing tax rates and tax brackets.

Any of these far-reaching changes could have a big impact on the tax refund or balance due on the tax return taxpayers file next year. That's why the IRS encourages every employee to do a “paycheck checkup” soon to check that they are having the right amount of tax taken out of their pay. The IRS Withholding Calculator and Publication 505, Tax Withholding and Estimated Tax, can help.

A checkup is especially important for those with high incomes and complex returns because they are often affected by more of these changes than people with simpler returns. This is also true if they also make quarterly estimated tax payments to cover other sources of income or are subject to the self-employment tax or alternative minimum tax. Click to read the full article.