[Table] Make Field Required (Yes or No) Based on a value in another Field

Hello,
I have a table for customers Info and It contains 3 columns.
1- Communication method (Whatsapp OR Instagram),
2- The customer number,
3- customer username.
Table Q.png

I want, if the method of communication is on WhatsApp, the number column must be required, and it is not possible to write anything in the username column.
Otherwise If the method is To communicate on Instagram, the username column must be required, and nothing can be written in the number column.

Is this possible guys?
And I hope my question is clear and thank you very much in advance...

Originally Posted by Bernie Deitrick

Sorry - I thought that this was an Excel post.

No, they are Access tables that I am trying to create to manage customer records, and of course I will later create queries and reports based on these tables.

Thank you very much @alansidman for this clarification.
I thought i can achieve this validation in tables instead of forms .
Anyway, thanks to point it out. Now I can research about this topic, hoping I can solve this problem myself...