QuickBooks Payroll and South Carolina Form WH-1606: What Users Need to Know

QuickBooks Desktop payroll users filing South Carolina’s Form WH-1606 — the combined fourth-quarter and annual reconciliation of income tax withheld — generally find that the software prefills most fields automatically, but several manual steps remain that catch filers off guard.

What the Form Covers

Form WH-1606 serves double duty: it reports both the fourth-quarter SC state income tax withholding figures and the annual reconciliation data on lines 7 through 10. The return is due at the end of February and can be TeleFiled when no payment is owed or a refund is due. Otherwise, it is mailed to the South Carolina Department of Revenue’s Withholding unit in Columbia.

QuickBooks populates the majority of the form from existing company, payroll, and employee data. In most cases where all records are current and complete in the company file, no additional manual entry is needed beyond reviewing what the software filled in.

The 1099 and W2G Gap

The most common stumbling block involves non-W-2 withholding. QuickBooks tracks only W-2 data for this form, so any state income tax withheld from 1099 or W2G filings will not appear automatically. Users must enter these amounts manually using the smart worksheet located above Line 1.

For fourth-quarter withholding from 1099s and W2Gs, the total goes on Line D of that smart worksheet. QuickBooks then adds the figure to Line 1 and transfers the combined total to Line 7 for the annual reconciliation. Deposits of withholding reported on 1099s and W2Gs follow a similar path: the fourth-quarter deposit total goes on Line E of the smart worksheet, and the software adds it to Line 2.

Users who miss this step risk underreporting total withholding and deposits, which can trigger mismatch errors when the state cross-references the filing.

Reviewing Withholding Numbers

For filers who want to verify where QuickBooks pulled specific figures, the form window provides hyperlinks that trace amounts back to their source data within the company file. This is particularly useful when a number on the form does not match internal expectations or prior-quarter records.

Users who need a broader view of their payroll data can summarize it in Microsoft Excel directly through options available on the form screen. Saving a copy of the completed form as a PDF is also supported from within the same interface — useful for recordkeeping or for sharing with an accountant without exporting the entire company file.

Penalty, Interest, and TeleFile

Line 5 covers penalty and interest, which QuickBooks does not calculate. Filers must determine these amounts themselves using the calculator available on the South Carolina Department of Revenue website.

When no payment is due, the form can be filed by phone through the state’s Business Tax TeleFile system, which eliminates the need to mail anything. This option applies only to zero-payment or refund situations.

Withholding Number Verification

The South Carolina Withholding Number is a nine-digit identifier. If the number appearing on the form is incorrect or needs updating, changes should be made through QuickBooks Payroll Setup or the Payroll Item List setup rather than typed directly on the form. Correcting it at the setup level ensures the right number carries forward to future filings.

Fields QuickBooks Does Not Fill

For any field the software leaves blank, the in-product help accessible from the form window provides field-by-field guidance. The same help resource covers general form-window navigation and troubleshooting for specific issues encountered during the filing process.

The key takeaway for anyone preparing WH-1606 in QuickBooks is straightforward: the software handles W-2 data well, but filers with 1099 or W2G withholding must remember the manual smart-worksheet entries on Lines D and E. Missing those entries is the most likely path to an inaccurate reconciliation.