I have entered a customer as a vendor by mistake How can I change their profile from vendor to customer?

Thanks for dropping by the Community, art-hanging-desi.

I’m here to help make sure you can change the vendor profile to a customer. We’ll have to inactivate the supplier’s information and set up a new customer name. Let me guide you through the step-by-step process.

To delete the vendor:

1. In your company, tap the Expenses menu on the left panel and choose Vendors.
2. This action will take you to the Vendors Center.
3. From there, tick the box of the vendor's name and click the Batch actions to select Make inactive.
4. Press Yes to confirm.

To add a customer:

1. Tap the Sales menu on the left panel to choose Customers.
2. Then press the New customer button in the upper right to open the Customer information window.
3. In the Last Name field, choose a name one keystroke different from the vendor name (such as John Doe, if the Vendor name was John J Doe, for example).
4. Enter the rest of your client’s data in the field boxes.
5. Click Save.

Once done, perform Steps 3-6 in this article: Moving names from one list to another. For detailed instructions proceed directly To change a Vendor to a Customer section.

I’m adding some links below to help you in the future. These resources will guide you on how to stay organized and keep track of your customers’ data and lists in QuickBooks Online (QBO).

• Add and manage customers in QuickBooks Online
• How to edit, delete, and restore list elements

Please know that I'm just a reply away if you need any further assistance managing your customer and vendor list. Have a great day!