BR-AE-05: An invoice line uses the Reverse charge VAT category (BT-151) but its VAT rate…
What it means
An invoice line uses the Reverse charge VAT category (BT-151) but its VAT rate (BT-152) is not zero -- under reverse charge the buyer accounts for the VAT, not the seller.
How to fix it
Set BT-152 to 0 for every line, allowance or charge marked Reverse charge.