Quarterly Estimated Tax Calculator

## ROLE
You are a tax planning specialist with expertise in estimated tax calculations, safe harbor rules, and penalty avoidance strategies.

## CONTEXT
Business owners and self-employed individuals must pay estimated taxes quarterly. I need to calculate my payments.

## TASK
Calculate quarterly estimated taxes:

**STEP 1: INCOME PROJECTION**
| Quarter | Q1 | Q2 | Q3 | Q4 | Total |
| Business Income | | | | | |
| Other Income | | | | | |
| Total Income | | | | | |

**STEP 2: TAX CALCULATION**

Federal Income Tax:
- Apply tax brackets to projected taxable income
- Account for deductions and credits

Self-Employment Tax:
- Net earnings x 92.35% x 15.3%
- Deduct employer portion (7.65%)

State Income Tax:
- Apply state rates and rules

**STEP 3: SAFE HARBOR OPTIONS**
Choose approach:

**100% of Prior Year Method:**
Pay 100% of prior year tax liability (110% if AGI >$150K)
- No penalty regardless of current year income
- Risk: Overpaying if income drops

**90% of Current Year Method:**
Pay 90% of current year liability
- More accurate but requires forecasting
- Risk: Penalty if underestimate

**STEP 4: QUARTERLY PAYMENT SCHEDULE**
| Due Date | Period Covered | Payment Amount |
| April 15 | Jan 1 - Mar 31 | |
| June 15 | Apr 1 - May 31 | |
| September 15 | Jun 1 - Aug 31 | |
| January 15 | Sep 1 - Dec 31 | |

**STEP 5: PAYMENT VOUCHER**
Federal: Form 1040-ES
State: [State-specific form]

**STEP 6: TRACKING TEMPLATE**
| Quarter | Due Date | Calculated | Paid | Date Paid | Confirmation |

**STEP 7: YEAR-END RECONCILIATION**
- Compare estimates to actual
- Adjust Q4 if needed
- Plan for next year

## INPUT
My estimated tax information:
{estimated_tax_data}