Understanding your CP30B notice

The IRS Tax Withholding Estimator can help you determine if you have the right amount of tax withheld from your paycheck.

Checking your withholding can help protect against having too little tax withheld and facing an unexpected tax bill or penalty at tax time next year.

Generally, most taxpayers will avoid this penalty if they owe less than $1,000 in tax after filing their return or if they paid at least 90% of the tax for the current year, or 100% of the tax shown on the return for the prior year, whichever is less. There are special rules for farmers and fishermen and Higher Income Taxpayers.

If you are an individual, estate, or trust and at least two-thirds of your gross income is from farming or fishing, use Form 2210-F, Underpayment of Estimated Tax by Farmers and Fishermen to see if you owe a penalty for underpaying your estimated tax. Qualifying farmers and fishermen are required to pre-pay only two-thirds (66.67%) of their tax, or 100% of the tax shown on the return for the prior year, whichever is less. See Farmers and Fishermen in About Publication 505, Tax Withholding and Estimated Tax for more information.

If your adjusted gross income (AGI) is more than $150,000 ($75,000 if married filing separately) you are required to pre-pay 90% of the tax for the current year or 110% of the tax shown of the return for the prior year, whichever is less.

Estimated tax payments are generally due on April 15, June 15, and September 15 of the tax year, and on January 15 of the next year.

For filers with a taxable year that ends in a month other than December, the payments are due on the 15th day of the 4th, 6th, and 9th months of the taxable year, and on the 15th day of the first month of the following taxable year.

You should receive your refund in 4-6 weeks. Visit Where’s My Refund? to see your personalized refund date as soon as the IRS processes your tax return and approves your refund.