Tax Clarity Lab

Schedule 1A Calculator

Calculate OBBBA deductions in minutes, not hours.

Calculate Now →View all products

Problem: Manual calculations are error-prone

Schedule 1-A under the One Big Beautiful Bill Act (OBBBA) introduces four deduction categories with complex phaseouts and eligibility rules. Doing this by hand is tedious and risky. Tax professionals need a tool that computes correctly, documents every step, and keeps client data private.

Solution

The Schedule 1A Calculator walks you through a 7-step wizard: MAGI, Tips, Overtime, Car Loan Interest, and Seniors. Every line is traceable. Export to PDF with an IRS-style form. Run What-If scenarios to compare methods. All processing happens in the browser — no client data is ever sent to our servers.

Key features

  • Done in minutes, not hours
  • Complete audit trail
  • What-If scenario testing
  • IRS-style PDF export
  • 100% privacy (browser-only)
  • No account required

Privacy-first

Client data never leaves the browser. No account required. No transmission of financial data. Built for tax professionals who take confidentiality seriously.

Pricing

Free for all users. Start calculating Schedule 1-A deductions with a complete audit trail — no signup required.

Calculate Now →