Rounding and VAT calculation in B2Brouter

When you need to adjust a small cents difference on an invoice, it is important to keep in mind that in B2Brouter VAT cannot be rounded. The adjustment can only be applied to the invoice total.

Basic rule

• VAT is calculated according to the lines, discounts and taxes applied.
• Rounding does not modify the VAT amount.
• The adjustment is only used to correct the final invoice total.
• Quotes do not support a rounding adjustment.

How to activate the rounding adjustment

To add the adjustment to an invoice:

1. Open the invoice in edit mode.
2. Go to the Collection section.
3. Activate the option Add references, prepayments, withholdings.
4. Use the Rounding adjustment field.

Once this field is filled in, the system adjusts the invoice total without altering the VAT calculation.

How it behaves with discounts

Before applying the rounding adjustment, the system calculates the amounts and taxes normally according to the invoice data.

Line discount

If you apply a discount directly to a line:

• the discount affects the taxable base of that line
• VAT is recalculated on the resulting line amount
• the rounding adjustment, if used afterwards, only modifies the final total

Discount on the invoice total

If you apply a discount to the invoice total:

• the system recalculates the amounts and taxes based on that overall discount
• VAT is still calculated automatically from the result
• the rounding adjustment should only be used to correct the final cents difference

Limitation for quotes

Quotes do not allow a rounding adjustment.

If you need to apply this type of adjustment, you must do it on the invoice, not on the quote.

When it is useful

The rounding adjustment is useful when:

• you need the final total to match an external amount
• there is a small cents difference due to calculation criteria
• you want to correct the total without changing the lines or taxes

If you need to modify the taxable base or the VAT amount, you should review the lines, discounts or taxes applied to the invoice. You can also check how to create an invoice.