Can I reclaim VAT back from a invoice from a previous quarter?

I'm here to provide the steps to reclaim your VAT in QBO, carol.griffiths,

Before we start, may I know if you received a credit for a VAT overpayment? If so, you can create a tax adjustment to reduce the liability for that quarter. Here's how:

1. From the navigation panel, click VAT.
2. Click on Prepare VAT.
3. Press the Adjust icon in the VAT line that you want to change.
4. Enter the Adjustment Date and VAT rate.
5. Choose an account from the Adjustment Account drop-down list.
   • If you are making the adjustment because you received a credit and you owe less VAT to the government, choose an income account that you create for this purpose.
   • If you are making the adjustment to include a fine, penalty, or interest on a VAT return, choose an expense account, such as Interest Expense or Non-deductible Penalties.
6. In the Amount section, enter the amount of the adjustment.
7. Add a memo to describe the adjustment.
8. Hit Save.

I would also recommend contacting HRMC to get additional advice on how to handle a VAT reclaim. Here's an article to guide you on how to use the VAT feature in QBO UK: VAT: Getting Started.

Please let me know if you have additional questions about the steps. I'm here to help you any time. All the best!