us-quarterly-estimated-tax - Calculate U.S. federal quarterly estimated taxes
Calculates federal estimated tax requirements, safe-harbor payments, due dates, annualized instalments, penalties, and withholding strategies for sole proprietors and single-member LLCs.
Tags
Updated: 2026-09-30Capabilities
Typical Inputs
Typical Outputs
What this skill does
- Calculate estimated tax requirements
- Apply safe-harbor thresholds
- Schedule quarterly instalments
- Annualize income instalments
- Compute Form 2210 penalties
- Classify federal tax debits
- Identify out-of-scope cases
Inputs
- Expected federal tax
- Prior-year total tax
- Prior-year AGI
- Expected withholding
- Refundable credits
- Filing status
- Schedule C profit estimate
- Quarterly profit and loss statement
- Bank statement transactions
Outputs
- Estimated payment requirement
- Quarterly instalment amounts
- Annualized instalment amounts
- Form 2210 penalty computation
- Bank transaction classifications
- Scope and refusal messages
Requirements
- U.S. federal tax context
- Sole proprietor or single-member LLC
- us-tax-workflow-base v0.1+ loaded