Cause

When running a Core HR to CMiC data sync, you may see this error:

"Write to CMiC Construction - The record will not be synced since the start date in the source system [START DATE] matches an existing effective date for Tax Overrides [EFFECTIVE DATE] in CMiC."

This error will only block tax data from syncing to CMiC until corrected.

Issue

• A state or federal tax update is being sent from Core HR to CMiC with an effective start date that is the same as an existing tax record in CMiC.
• CMiC does not allow two tax records with different data to share the same effective start date, causing the sync to fail for tax data.

Resolution

1. Log in to Core HR
2. Search for and open the employee record
3. Navigate to: Payroll > Taxes
4. Locate the tax record (state or federal) causing the error.
   • Check the sync logs for the effective date in CMiC that is conflicting.
5. Update the tax record’s effective start date in Core HR to a date later than the conflicting CMiC date.
6. Save your changes.

Next Steps 

• Re-run the sync.
• The error will clear, and the updated tax data will successfully pass to CMiC.

Key Points to Remember

• This error only affects tax data—other employee information will continue syncing.
• Always verify effective dates for tax updates before syncing.
• CMiC requires each tax record to have a unique effective start date.