So I want to acheive this, all in the same Datacard for inputting bank account information, like so, as normally bank account input fields are made to look like:

I want that once you finish writing the "ES" or the "YY" it takes you to the next field so you can keep writing withouth clicking again. Of course, the combined text is what the update property should be set as (created a textfield to concatenate all that).
The problem here, is that it would just save on the first time, as all textboxes would go blank as no "Parent.Default" will help here.
i guess I could add 6 sharepoint columns that store each textbox information but ugh... Thought that would complicate everything further, as I need these boxes right next to each other, with no datacards in between them.
So to sum up:
- Need to limit how many characters can be placed in each text input.
- Need that when you reached the limit, it takes you to the next combobox
- Need a way to have it set up like this but not going blank once you save the sharepoint item.
Is any of this possible? Ty for your input!