Question 1

Does Invoice Tax Calculator upload my files?

Accepted Answer

Yes. Invoice Tax Calculator runs entirely in your browser using WebAssembly and Web Workers. Open DevTools → Network while using the tool — you will see no requests containing your file data. Works offline after the page loads.

Question 2

Can I verify Invoice Tax Calculator is private?

Accepted Answer

Yes. Follow our Privacy Verification Guide at https://aladdin-agent.net/privacy-verification — disable Wi-Fi and confirm the tool still works.

Question 3

Is Invoice Tax Calculator free?

Accepted Answer

Yes. Invoice Tax Calculator is free with no signup. Pro unlocks batch processing, lossless export, and industry templates.

Question 4

How do I use Invoice Tax Calculator?

Accepted Answer

Open https://aladdin-agent.net/tools/invoice-tax-calculator, upload or paste your input, then follow the on-screen steps. VAT / GST on invoices — add tax or extract from gross, 100% local.