Contact

Corrections are genuinely welcome. Fee schedules change without much notice, and a seller who spots a stale rate does everyone a favour by saying so.

Email

hello@netmarginlab.com

Replace this address with your own before publishing the site. Messages are read and rate corrections are checked against the marketplace's published schedule.

When you report a fee change, include

• Which calculator and which field
• The rate you are seeing in your dashboard
• The marketplace, category and account type it applies to
• The date you observed it

With those four things the correction can usually be verified and published within a day.

What this inbox is not for

Individual pricing advice, marketplace account problems, customs classification rulings or tax questions. Those are best answered by the marketplace's own support, a licensed customs broker or a qualified accountant — they have the facts of your specific situation, and this site deliberately does not.