What is a word that describes both adding and editing data?

How about Content Processing form?

You are trying to find a word to describe to different actions: creating and editing. What do they have in common that is reasonably unique to this pair? If you can think of something, use that; if not, it is impossible, and you should use a composite name, like "create and edit". But my guess is that you are using a certain function in this form that is used for both actions: can you describe this function, and pick out a descriptive word from that?

How about CRUD form ? More info from wikipedia:

In computer programming, create, read, update and delete (CRUD) are the four basic functions of persistent storage. Sometimes CRUD is expanded with the words retrieve instead of read or destroy instead of delete. It is also sometimes used to describe user interface conventions that facilitate viewing, searching, and changing information; often using computer-based forms and reports. The term was likely first popularized by James Martin in a 1983 book titled "Managing the Data-base Environment"

Simply referring to it as a data-entry form may be a solution that conveys the non-specific nature of the form.

To @Cerberus' point, adding some additional detail specific to what the form is creating or editing would provide additional context for the users:

The customer records data-entry form has all the fields I need...