Preview online system (pdf)
NOTE: On the first page of the online change form, you will see an instruction to log in with a User ID and PIN, if you are a “Returning User.” Returning users are those who started using the form to request a change, but didn’t finish the entire form. Those entering the form to make a change for the first time do not need to log in.
Or Complete and Send a Paper Form:
Filing frequency change? Choose an effective date that is the first day of a future calendar quarter. If you choose to file more often than you are required to, you must file and pay electronically.