I have a template field for TMK (tax map key). It's a 12-digit (\d{12}) multi-value template field (Text data type). Many TMKs have the last 4 numbers being zeros. For example, 1-2-345-678-0000.

For easy data entry, is there a way to have it automatically fill the remaining digits with zeros? For example, I'd like to make it so that people can enter 12345678, press the Tab key and not have to type the remaining 0000, but have it automatically fill.