South Carolina Form WH-1612 Transmittal in QuickBooks: What Employers Need to Know

QuickBooks Desktop users responsible for South Carolina payroll tax filings have been working through the mechanics of Form WH-1612, the state’s transmittal document for W-2s and 1099s submitted by CD-ROM or paper. While QuickBooks prefills the majority of the form automatically, several details require manual review — and misunderstanding the filing thresholds can lead to rejected submissions.

What the WH-1612 Covers

The WH-1612 serves as a cover sheet for submitting W-2s, W-2cs, W-2Gs, and — only those with South Carolina tax withheld — 1099s to the South Carolina Department of Revenue. QuickBooks populates most fields from existing company, payroll, and employee records, so in a typical scenario where all data has been entered consistently throughout the year, users should find little to complete manually. However, fields the software does not auto-populate still need review before filing.

The 1099 Withholding Gap

The most common point of confusion involves 1099 reporting. QuickBooks tracks and calculates W-2 data for the withholding figures in Section A, but it does not automatically fold in state tax withheld on 1099 forms. Employers who issued 1099s with South Carolina tax withheld must manually enter those amounts on the smart worksheet lines above Section A. The software then adds the manually entered figure to the W-2-based withholding total already calculated. Users who skip this step will underreport total state withholding on the transmittal.

The same manual-entry principle applies to wages, tips, and other compensation reported on 1099s — those amounts must be entered on the corresponding smart worksheet line rather than appearing automatically.

Filing Method Rules and Thresholds

South Carolina imposes a volume-based filing requirement. Employers issuing 250 or more W-2s to South Carolina employees must submit them electronically or by CD-ROM. Those below the 250 threshold have flexibility: electronic filing, CD-ROM, or traditional paper forms are all acceptable.

Several procedural rules apply regardless of filing volume:

• Do not file WH-1612 if you filed electronically through the state’s W-2 Portal or if you did not issue any of the covered form types during the year.
• Mail separately from Form WH-1606 (the state’s monthly or quarterly withholding return).
• Submit a separate CD-ROM and WH-1612 for each form type — W-2, W-2c, W-2G, and 1099 cannot be batched together on a single transmittal.
• Do not file until the W-2s, W-2cs, W-2Gs, or 1099s have actually been issued.

The WH-1612 deadline falls on or before the last day of January, with the standard extension to the next business day when that date lands on a weekend or holiday.

Form Sections and What to Complete

All filers must complete Sections A and C of the form. For CD-ROM submissions, Section B is also required. QuickBooks handles the prefill for these sections based on payroll data already in the company file, but the South Carolina Withholding Number — a nine-digit identifier — should be verified. Corrections can be made through Payroll Setup or the Payroll Item List setup if the number on file is incorrect.

Verifying the Numbers

For employers who want to confirm where QuickBooks derived specific figures, the form window provides hyperlink references that trace amounts back to their source within the payroll data. Users can also summarize payroll data in a spreadsheet for independent verification, and the form can be saved as a PDF for recordkeeping before submission.

The built-in Help button on the form window addresses general navigation and common troubleshooting questions specific to the WH-1612 view in QuickBooks.

Practical Takeaway

The WH-1612 is largely automated in QuickBooks when payroll data has been maintained consistently, but the 1099 withholding entry is the step most likely to be missed. Employers filing by CD-ROM should plan for multiple transmittals if they are submitting more than one form type, and the 250-W-2 threshold determines whether electronic or CD-ROM filing is mandatory rather than optional.