Ricardo,

We use fiscal year when we save to the repository so that we can look under 2017 and see everything saved for that year.  I am not sure if this is what you are looking for but here is what we do.

I always put a date field at the top of every form using Date as the field name and current_date as the Default value.

I add a single line field and call it Fiscal_Year.  Our fiscal year starts on July 1st.  So in the advanced tab I put in this formula:

=IF(Date>DATE(YEAR(Date),7,1),YEAR(Date)+1,YEAR(Date))

This will put the year in that field and you can call that variable whenever saving the form.

If you are wanting the calendar year instead of a fiscal year, then you can put something like this:

=YEAR(Date)  Which will give you the current dates year and again you can use the variable to save in the repository