The steps for recharging the Pinduoduo merchant payment account are as follows:

1. Log in to the Pinduoduo Merchant Edition and click on the account option on the page.

2. On the account overview page, find and click the recharge button.

3. On the recharge page, select the amount you want to recharge and click the Recharge Now button.

4. On the recharge method selection page, select the recharge method you want to use, such as WeChat, Alipay, bank card, corporate Alipay, credit card, corporate WeChat, online banking, etc.

5. Select an available payment method and follow the prompts on the page to complete the recharge operation.

6. After the recharge is completed, click the return button on the page and check whether your balance has been successfully credited.