Often, a query that provides records for a form cannot be updated due to table joins or aggregate functions in one or more queries, which in your case may be a good thing. Otherwise, you'd be editing the record when your post reads as if you want to display more information related to a record field.
Sounds like you need to go back to the query/queries that provide the records and adjust them to get the values you want, then ensure your form controls point to those query fields. If the values are not in the table, then you have a problem that can only be resolved by introducing hacks, such as having locked and unbound textboxes on a form wherein expressions in those controls (or vba) provide a value based on a related control value. If the form is a continuous form, then you may be out of luck as far as using that hack is concerned. Not sure why you'd be concerned about running out of table room. Have you researched table, field and database size limitations?
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.