I think this should work.
I created a parameter called 'DateChoser' which allows for text entry, and added it to the sheet.
then I created a calculcated field called 'ShowYears' which checks to see if the year in the data is the same as the year in the DateChoser or the previous year, if so, then it shows a value of 1.
Then I put that DateChoser (as a Dimension) into the filter and selected values of '1' to be shown.
PY.twbx.zip 326.8 KB