Contact

Questions, feedback, correction requests, partnership ideas, and privacy requests can be sent by email. We welcome practical messages that help improve the calculators, formulas, guides, and seller experience.

Email: jiangchongyang01@gmail.com

Product feedback: if a calculator is confusing, a result looks wrong, a field is missing, or a guide needs a better example, please include the page URL, the inputs you used, the expected result, and the actual result you saw.

Content corrections: marketplace fees and seller policies change over time. If you notice an outdated statement or a missing caveat, send the source link and we will review it.

Partnerships and suggestions: we are open to practical ideas around seller templates, ecommerce education, useful integrations, and distribution partnerships, as long as they are relevant to ecommerce sellers.

Privacy and data requests: for waitlist email removal, feedback deletion, access requests, or privacy questions, use the same email address and include enough context for us to find the relevant record.

SellerMargin Tools is operated as an independent project. We try to respond to relevant messages as soon as practical, but response times may vary.