淘宝的邮政编码的修改步骤为：
1、电脑成功登录淘宝网后，点击主页面的我的淘宝。
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2、进入页面后，点击我的收货地址。
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3、在新页面中，重新新增收货地址，输入邮政编码，保存即可。
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4、或者是选定需要修改邮政编码的地址，点击修改。
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5、进入修改页面，输入信息保存即可。
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扩展资料：
1、修改地址需要商品在出库之前修改，出库后无法修改。
2、付款后地址只能修改一次，无法重复修改地址。