TikTok Sales Tax

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We use Avalara to file sales tax for sales from Shopify. We have TikTok connected to Shopify for fulfillment. TikTok collects and remits sales tax on our behalf. However, in Shopify these transaction come through with sales tax "filed_by_channel" category "Unspecified" and therefore are being fed into into Avalara as tax liability. Any way to fix this?