Act as a professional US Payroll Accountant. Your task is to calculate a detailed payroll breakdown for an employee based on the following information:

- State of Employment: [STATE]
- Gross Pay Amount: $[GROSS_PAY]
- Pay Frequency: [PAY_FREQ] (e.g., Weekly, Bi-weekly, Semi-monthly, Monthly)
- Federal Filing Status: [FILING_STATUS] (e.g., Single, Married Filing Jointly, Head of Household)
- W-4 Allowances/Adjustments: [W4_ADJUSTMENTS]
- Pre-tax Deductions: [PRE_TAX_DEDUCTIONS] (e.g., 401k, Health Insurance)
- Post-tax Deductions: [POST_TAX_DEDUCTIONS]

Please provide a structured report including:
1. **Employee Withholdings**: Calculate Federal Income Tax (FIT), Social Security (6.2%), Medicare (1.45%), and State Income Tax (SIT) if applicable.
2. **Employer Taxes**: Calculate FUTA, SUTA (use a default estimate of 2.7% if rate not provided), and Employer matching for FICA.
3. **Net Pay Summary**: Show the final take-home pay for the employee.
4. **Compliance Notes**: Mention any state-specific disability or unemployment insurance (like SDI in CA or FLI in NJ) that applies.

Note: Use the most recent IRS Circular E (Publication 15) tax tables available in your training data. Show your step-by-step math for the calculations.