Use this form for calculation problems, unclear explanations, broken links and source corrections. Include the page URL and the inputs needed to reproduce a calculator issue. Do not send passwords, payment details or customer information.
What to include
- The page URL and the field, formula or statement in question.
- The quantity, pricing mode and non-sensitive inputs needed to reproduce a calculation.
- The result received and the result expected, including any intermediate step that differs.
- For a source correction, the official page and the date it was checked.
The form is for site feedback and corrections. It is not a channel for customer orders, professional tax advice or sending confidential business records.