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You can, but it's not really clear what you're doing.<br />
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Assuming your &quot;example expression&quot; is similar to your real one, then what's the point of storing the value from &quot;Name&quot; in another field? You've already got that value (in the Name column, presumably) so what's the point in storing it again?
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Will be better if you upload sample DB with this form. related tables and some dummy data.<br />
There is some difference in editing of existing data and entering new one. For new one set default value for table's field to your form's field. If you like to edit existing data and take value from unbounded field, you will need VBA code
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~ I attached a sample database. &nbsp;The field in yellow on the form is the value I would like to capture in the table. &nbsp;Currently it is only displayed on the form. &nbsp;Thanks for your help.<br />
<a href="https://filedb.experts-exchange.com/incoming/2016/09_w38/1116263/TestDatabase.accdb" target="_blank" class="file-inline" title="Single table/Form with sample data (628 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>TestDatabase.accdb</a>
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TestDatabase.accdb

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What field in table should be filled? Do you like to fill it in existing records?
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The ESTPrice field should be filled in the table with the value in the yellow box on the form (ESP_Price). &nbsp;thanks
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Sometimes you need to save current price to document, because it could be changed later, but it is also obvious that calculated fields should not be saved without necessity.
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My form has a text box that has an expression in it. &nbsp;The expression is called expName3. &nbsp;I need the value of that expression to populate into a table ~ in a field labeled NametoUse. &nbsp;Is it possible to take the value from an expression on a form and have it populate into a table. &nbsp;<br />
Example Expression on my form: &nbsp;If there is a value in the Name field on Form C then give me the Name else it blank leave blank. &nbsp;Whenever the user types a different name the value in the expression will change. &nbsp;I then need to capture &nbsp;the value displayed in the expression and have it populate into a table. &nbsp;Thanks
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My form has a text box that has an expression in it.  The expression is called expName3.  I need the value of that expression to populate into a table ~ in a field labeled NametoUse.  Is it possible to take the value from an expression on a form and have it populate into a table.  
Example Expression on my form:  If there is a value in the Name field on Form C then give me the Name else it blank leave blank.  Whenever the user types a different name the value in the expression will change.  I then need to capture  the value displayed in the expression and have it populate into a table.  Thanks

MS Access 2013

Microsoft Access is a rapid application development (RAD) relational database tool. Access can be used for both desktop and web-based applications, and uses VBA (Visual Basic for Applications) as its coding language.