Requested date in sales order line

Summary:

Hi

We need to create a sales order for an item with different delivery dates. For eg. in january we will ship 100 qty for an item , in Feb, another 100 qty for same item and so on. Upon checking i find that the requested date at sales order line is not editable. Please suggest how we can mention different dates

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):