Because the determination is left until then. Place of supply, classification and tax treatment are decided from a report at month end rather than when the invoice was raised.
By that point the customer has the invoice, their input credit depends on it, and correcting it means credit notes and amended returns rather than an edit.
Classification lives on the item, so every invoice inherits it. Place of supply is determined from the customer's registration and the nature of the supply when the invoice is raised.
So the reports are a view of records that were already correct rather than a monthly reconstruction that finds problems.
It does not file your returns and it does not interpret classification. Ambiguous items need advice, and choosing the code with the lower rate is the expensive approach.
And rates and thresholds change. Books applies what you configure; confirming it is current is yours.
Purchase records and what suppliers actually filed will still differ — that is outside your control. But finding a mismatch early means the supplier may still fix it.
And credit and debit notes reference the original invoice with a stated reason, which keeps the audit chain intact.
On the item, so invoices inherit it consistently.
No. It produces the records and reports; filing stays with you.
Credit or debit notes referencing the original, never an edit.
We will run it end to end on your own numbers in half an hour, and tell you honestly which parts Treepie does not improve.