I've got some information about filing VAT returns for the previous period, @Steven_ZA.
When you file the VAT return, you can set the End date and Filing date. Once filed, the only way to edit this is by reaching our support team. They have the necessary tools to help unfile it so you can make any necessary adjustments.
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- Log in to your account.
- Select the Help button and inter Customer Support.
- Choose Contact Support Team and enter Edit VAT return.
- Click the Contact Support Team link.
- Choose a way to connect with us.
Additionally, let me share this article to help review what you owe and fill out tax forms: File your VAT return and record tax payment in QuickBooks Online.
Let me know in the comment section if you have additional questions about filing a VAT return. I'll be glad to assist you again. Have a pleasant day!