You can enter a total of up to four modules in the field above, using the numbers 1-7 (corresponding to the old style Modules 1-7).
If you have passed Module 1, you would enter 1.
If you have passed Modules 2 and 3, you would enter 23.
If you have passed Modules 4, 6 and 7, you would enter 467.
If you have passed Modules 2, 3, 5, 6, you would enter 2356.
The order in which you list the Modules does not matter.
More information about the IRSE Exam is available on the IRSE website.