To ensure the correctness of tax records, taxable persons are required to keep a ledger of prepayments made.
Users of Article 65 of the ZDDV must also make sure that, in the event that a deductible share has change between the time a prepayment was paid and the time it was used, the negative prepayment invoice is posted so that the value of the input tax accounted and entered in tax records when the prepayment was paid is reversed.
We will start from the example discussed in Paying and Closing a Prepayment Made: An Example and add the following:
- The prepayment was made in a month when the deductible share was 0.9
- Used (negative prepayment invoice was made) in a month when the deductible share was 0.8.
1. Post the statement from the bank account
Just like in the above example.
2. Enter the invoice for the prepayment made
Just like in the above example.
3. Post the invoice for the prepayment made (deductible share: 0.9)
Because the deductible share is only 90% of the tax accounted on the document, the post will be different: the input tax amount will be 10% lower.

4. Enter the received invoice
Just like in the above example.
5. Link the invoice with the prepayment (negative prepayment invoice)
Just like in the above example.
6. Automatically post the negative prepayment invoice (deductible share: 0.8)
The post will be different here too. For invoices for the prepayment made, the deductible share in this month would be 80%. With negative prepayment invoices, we must reverse the share of the input tax that was accounted when the invoice for the prepayment was received.
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In the Links | VAT tab of the negative prepayment invoice, find the VAT date from the original invoice for the prepayment made. If it is a user of Article 41 of the ZDDV, this is the date used to determine the share of input VAT for posting and filing in the ledger of prepayments made. |


7. Automatically post the received invoice
When the invoice is received, the recognized deductible share is 80%, which is why the part of the post of the received invoice pertaining to taxes will also be different.

8. Link the prepayment made with the received invoice
Just like in the above example.
9. Ledger of prepayments made
If you create a report of the ledger of prepayments made for both periods together, you'll notice that the total value of the documents and tax is equal to 0; the negative prepayment invoice has cancelled it out. The values of the input tax are of course different than in the example we started from: Paying and Closing a Prepayment Made: An Example
