How to adjust the tax percentage? Error on the site side does not change the percentage.

Hello everyone,
I’m filling out the tax form in my account on dev.epicgames.com, and I noticed that the full 30% withholding tax rate is being applied. As far as I understand, under the tax treaty between the United States and Russia, this rate should be reduced (for example, to 10% or 15%).

However, while completing the tax form on the site, the system automatically set the rate to 30%, with no option to change it or influence the percentage in any way. It looks like the form is pre-filled with this rate, and it cannot be adjusted manually.

Has anyone experienced this issue? Could it be a system error on their side? I’d really appreciate any advice on how to fix this and ensure the reduced treaty rate is applied correctly.

Thanks in advance!