Hi Tom
If you open up the debug panel, under the “TextProperties” section, you can find the namespace and keys of all the inputs which have manual values entered (which in this case also include the manually selected accounts in the account collections):
An alternative way of finding names from custom inputs without seeing the source code can also be to use “Inspect element” in the browser and the data-name attribute on the element equals the namespace.key:
However, I would like to note that accessing the custom directly period.reconciliations.2018_disallowed_expenses.custom.accounts.accounts_non_deduct_taxes will not track if there are default accounts selected, so keep this in mind in case you use configuration for this template.
Hope this helps you further!
Kind regards
Wouter