Go to Customizations – > List records & fields -> entity fields – > New
If you want to create a custom field in
Customer
Vendor
Employee
Contact
Partner etc.
You will have to select entity fields.
Enter label name, Select Applies to , and filed type. There are filed type like if you want a simple text field select free-form Text
Finally go to display – >subtab -> select main , if you want it to be displayed on main part of the page. After doing this click save and you will get a internal id and filed will be created.
But if you want to create a custom field in
Inventory Item
Non Inventory Item
Service
Kit package
etc choose item fileds.
And if you want to create a custom field in
Purchase
Sale
Journal
Item fulfilment etc then select transaction body fields
