How do you ensure you get the same state tax refund as previous years?

[SweetieJean]

There is really no way to do that (except approximately), since your own tax situation and state tax law changes from year to year.  And many states start with the Federal figures, which can also change yearly.

But why do you wish to do so? Getting a refund gives the state an interest free loan all year.  However, you can adjust your state W-4 withholding to accomplish your goals. But periodically review that.