In Access, how can a user create a calculated field?

Creating a calculated field in Microsoft Access requires the use of expressions to perform calculations on existing fields in a table or query. When you utilize the field's properties, specifically in the design view of a table or a query, you can enter a custom expression that defines how the calculated field will derive its values. This allows for greater flexibility, as you can reference other fields in the same table, apply functions, and perform arithmetic operations, thus enabling dynamic calculations based on the data entered.

This option focuses on the built-in functionality of Access, which allows users to manipulate and compute data effectively within the database environment. By leveraging the expression under the field's properties, users can create fields that reflect computations such as sums, averages, or concatenated strings, which will automatically update as the underlying data changes.

The other choices do not accurately represent the method for creating calculated fields in Access. For instance, simply creating a new table is a step toward organizing data, but it does not directly involve creating a calculated field. Entering a formula in a text box pertains more to forms and reports rather than the backend structure where calculated fields are implemented. Importing formulas from Excel is outside the scope of Access's native capabilities and does not integrate directly into its data structure.