A) Go to Customization > Lists, Records, & Fields > Record Types > New.
B) See Entering Name and Display Settings
1)In the Name field, enter a name for the record type.
The maximum number of characters you can enter in the Name field is 300
2) In the ID field, enter a unique alphanumeric ID for the custom record.
3)In the Owner field, select the owner of this custom record type.
Only the owner can modify this record type.
4)In the Description field, enter a description of this record type.
5)To include a required Name field on each record entry, check the Include Name Field box.
If you check this box, the Name field appears as the first field on the record and in the record list.
6)To display the record entry ID that is automatically assigned by NetSuite to each new record entry, check Show ID.
7)In the Show Creation Date field, to display the creation date and time on each record entry, check the On Record box.
8)In the Show Last Modified field, to display the last modified date and time on each record entry, check the On Record box.
9) To display the last modified date and time for each record entry in your list for this record type, check the On List box.
10)In the Show Owner field, choose an option:
a)To display the record owner on each record entry, check the On Record box.
b)To display the record owner for each record entry in your list for this record type, check the On List box.
c)To permit the record entry owner to be changed, check the Allow Change box
11)Enter permission and UI settings
12) Click save and your custome record is created