Thanks for visiting us today, tetradrones.
I'm delighted to help you add a 100% VAT invoice to your VAT return/Expenses.
You will enter an amount (0.01) in two line items. The other one should be negative to offset the amount. You will add a tax code on the first 0.01. The negative amount should be set up as No VAT.
Once done, manually enter the VAT amount in sales tax field.
Let's make sure to enter all details before manually entering the sales tax.
I have attached a screenshot for your guidance.
Let me know if you have any other concerns. I'm here anytime you need assistance with QuickBooks Online.