You should not be routinely entering data into a table directly. I say routinely because one might add a few records this way for testing, but that's about it. You will need a form where its record source is the table or a query based on the table. The simplest method then would be to use the AfterUpdate event for the field you're entering 4 into so that it makes the other field = 10. You could do the reverse as well if desired. You can get help with that approach once you have the form built - unless someone gives you an idea you like better.
Last edited by Micron; 10-19-2018 at 04:27 PM.
Reason: spelin and gramur
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.