Kentucky Form K-1 Withholding Return in QuickBooks: What Users Need to Know

QuickBooks payroll users responsible for Kentucky state income tax withholding have a recurring question around Form K-1 — the Kentucky Employer’s Return of Income Tax Withheld — and how the software handles the filing requirements, due dates, and pre-populated fields that vary by deposit schedule.

What Form K-1 Covers

Form K-1 is the return Kentucky employers file to report and pay state income tax withheld from employee wages. The form must be filed for every reporting period — quarterly, monthly, or twice-monthly — regardless of whether any tax was actually withheld or whether the business had any employees during that period. A zero-liability return is still required.

QuickBooks prefills most of the fields on Form K-1 using the company, payroll, and employee data already entered. In most cases, users find they need to do little manual entry beyond reviewing what the software populated and confirming accuracy. Fields the software did not fill in should be reviewed and completed as needed.

Account Number Format

One point that catches users off guard: the Kentucky withholding account number must be either 6 or 9 digits long. QuickBooks expects the number in one of those two formats, and an incorrect length can cause the form to reject or flag an error.

Filing Frequency Determines Due Dates

The period beginning and ending dates on the form are populated automatically based on the dates entered when the form was created in QuickBooks. The due date, however, depends on the employer’s filing frequency:

Twice-Monthly Filers

Employers who withhold $50,000 or more in Kentucky income tax annually must file and pay on a twice-monthly schedule. The first period covers the 1st through the 15th of the month and is due by the 25th of that same month. The second period covers the 16th through the end of the month and is due by the 10th of the following month.

Twice-monthly filers must file electronically through Kentucky’s Withholding Return and Payment System, known as WRAPS. For the final reporting period of the calendar year, these employers file Form K-3 instead of Form K-1.

Monthly Filers

Employers withholding between $2,000 and $49,999 annually file monthly. The return covers each of the first 11 months of the year and is due by the 15th of the following month. Monthly filers must also use WRAPS to file electronically. As with twice-monthly filers, the last month of the calendar year requires Form K-3 rather than Form K-1.

Quarterly Filers

Employers withholding between $400 and $1,999 annually file on a quarterly basis. Unlike the higher-frequency filers, quarterly depositors have the option to file either electronically through WRAPS or by paper.

Payment and Submission

Payment of the total tax withheld for the reporting period must accompany the return. WRAPS can be used to submit payment electronically, or employers can pay by check or money order made payable to the Kentucky State Treasurer. The form and payment must be submitted on or before the due date shown at the top of the return.

Year-End Switch to Form K-3

A detail that users frequently overlook: all filing frequencies transition to Form K-3 for the final period of the calendar year. Whether an employer files twice-monthly, monthly, or quarterly, that last return is not filed on Form K-1. This is a Kentucky requirement rather than a QuickBooks limitation, but the software’s prefill workflow means users should verify they are generating the correct form as year-end approaches.

Changing Filing Frequency

Employers placed on a twice-monthly or monthly basis must continue at that frequency unless the Kentucky Department of Revenue grants permission to change. New thresholds can trigger a mandatory change — for example, an employer whose annual withholding crosses $50,000 must notify the state and move to twice-monthly filing.

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