Thank you for reaching out, cj. Let me explain why a filing or payment schedule is modified.
It can happen when the filing schedule and payment frequency settings are changed. You can switch it back to quarterly by going to the Payroll Settings window.
Here's how:
Sign in to your account.
Tap on Payroll Settings from the Gear icon.
Select Edit next to federal or the state you need to update (Federal taxor State tax).
Click on the pencil icon.
Choose Edit from the How often do you pay your taxes? section.