Hello, sakis.
I'd like to make sure I give the right steps for your concern. Do you mean to change the period on when you submit the VAT returns? If so, you can follow these steps:
- Go to the Taxes > VAT.
- Select the Edit VAT drop-down menu and choose Edit settings.
- From the I submit VAT returns drop-down menu, select the period.
- Click Save once done.
To help manage your VAT return in QuickBooks, you can check out these articles:
If you're referring to something else, please let me know in your reply. We're always available to assist you. Take care and stay safe.