TACoS Calculation Adjustment

We have identified an error in the way we previously calculated TACoS (Total Advertising Cost of Sales). As of May 21, 2025, we have updated the definition and calculation method of TACoS in our API, effective retroactively for the past year.
Please note that this adjustment may result in differences in your TACoS data compared to previous reports. To ensure you have the correct and historical TACoS data, we recommend re-downloading the advertiser performance report.