How do i change the shipping rate from 23% to 21% ?

Welcome to the Community, info1291.

I'm here to help and ensure that your questions are addressed accordingly.

However, for me to be able to provide you with the right issue resolution, could you please tell me where exactly in QuickBooks you're trying to change  the shipping rate? Are you using a third-party application? It would be best if you can send me a screenshot as well.

Any additional information would be highly appreciated.

Hope you can respond to me on this post so we can work with your concern together. Please know I'm ready to assist further. Have a good one.