Hello Jazzybear,
Welcome to the Community - thank you for your question!
You could create an adjustment on Box 6 to include the amount you are due to reclaim, however we would suggest to speak to an accountant to check how they would like you to record this, and whether they feel an adjustment would be correct. Otherwise, you could reclaim this in your next VAT period, by putting VAT on the transactions of you purchasing the assets so it creates an exception in the current period.
Thanks,
Talia