You can do this but there are a few caveats.
Datepickers don't work well but if you only select a year 9as a number) then this should be fine.
Default selected values may not be set to what you expect if you select a year more than once (i.e. you choose 2018 then change your mind and choose 2017).
Basically you just need to make the seconds dataset, rely on the value of your first parameter. I don't know what you data looks like but let's assume that you have a large dataset and each record has a Year, Type and then some more detailed columns.
Assume you want to choose the year, then choose from s list of types that are present in that year. I won't cover the final dataset as it's not part of your question ..
So let's say the first stored proc does something like
CREATE PROC GetYears AS
SELECT DISTINCT [year] FROM myTable ORDER BY [Year]`
Create a dataset called dsYears and point it to this stored proc.
In SSRS you create a parameter called say @pYear and set the available values to point to dsYears
Now create your second stored proc that accepts a year as a parameter so the proc will look something like
CREATE PROC GetTypes(@pYear as int) AS
SELECT DISTINCT [Type] FROM myTable WHERE [Year] = @pYear
Create a seconds dataset called dsTypes and point it to the seconds stored proc setting the parameters to be you @pYears parameter.
Now create your second parameter called @pTypes, make is multi-valued (I assume you want to select more than one type at a time in your final report). Set the available AND default values to point to dsTypes
That should be it. I've done this from memory so it might not be perfectly correct but hopefully close enough.
