Hi lucadurante-12-g,
It's a pleasure to see you here. Welcome! Making sure your sales tax is properly set up is essential for filing on time. QuickBooks Online simplifies your work, so you can accomplish your goals effortlessly. I'd be glad to help!
Here's how to edit your sales tax filing period;
1. From the left menu, select Taxes and then Sales tax
2. Click on Manage sales tax
3. Select the Edit ✎ beside the Agency name
4. Use the ▼ dropdown menu to choose when the Next period starts, the Filing frequency and the Reporting method
5. Hit Save
Let us know if this is solved. Your success is our number one priority and we're always happy to assist!
Feel free to get back to us, if other questions come to mind. We're here for you!