make an invoice date congruent with doc seq number after entering the receipt

Dear All,

We are not able to Incomplete a receivables invoice in the Transactions form.
This is due to the fact that we applied a receipt against that invoice.
Also after the reversal of the receipt the invoice cannot be incomplete.

We need to change the invoice date as that date is wrong respect to its Document Number sequence.
In fact we have other invoices with greater Document Number but previous Invoice Date, and this is not correct for fiscal reporting.

Can you suggest how we can change the invoice date as needed ?

Thank you,
Stefano