衣服类目审核问题

虎虎

各位朋友， 谁能帮我看看 我衣服类目审核的问题
- Column "Style Number": Must be entered into for all Child listings and must be unique to a variation.

- Column "product_tax_code": Must be entered into for all Child listings.

- Column "size_map": Must be entered into for all Child listings.

- Column "main_image_url": All images declined:
* Images were found to not have a pure white background (pure white blends in with the Amazon search and item detail pages RGB values of 255, 255, 255).
* Model must be completely forward facing


请问 "product_tax_code" 这一项要怎么提供？
还有图片的问题？
请大家帮帮忙