how do I change the first month of fiscal year

You can simply visit your Company settings to do it, Info2204.

Here are the steps to change your first month of the fiscal year in QuickBooks Online:

1. Navigate to the Gear icon and choose Account and Settings.
2. Click the Advanced tab.
3. Select the Pencil icon for the Accounting section.
4. Use the dropdown menu to choose the First month of the fiscal year.
5. Save and Done after.

If you have any questions, please click the Reply button.