> ## Documentation Index > Fetch the complete documentation index at: https://docs.useglimps.com/llms.txt > Use this file to discover all available pages before exploring further. # Changing a booked invoice > Change or delete an invoice that is already booked in Exact Online, straight from Glimps. An invoice that is booked in Exact Online can still be changed from Glimps. Glimps writes the change to Exact, reads the booking back to check it, and keeps a history of every change. You do not have to open Exact. ## Where to start Open the invoice in the [archive](/booking/archive), or open its link. Above the purchase entry you find the **Change invoice** card. Click **Change**. Glimps asks Exact what can still change. This takes a moment. What you can change depends on how the invoice was booked: | | Invoice without an Exact purchase order | Invoice booked against an Exact purchase order | | - | - | - | | Description and invoice number | Yes | Yes | | Remarks | Not used | Yes | | Due date, payment condition, payment reference | Yes | Yes, but not while Glimps holds the payment for an open approval | | Supplier, invoice date, period | Yes | No | | Ledger account, cost center and description of a line | Yes | No | | Line amounts and VAT, adding or removing lines | Yes | No | | Delete the booking | Yes | No | An invoice that was matched to a purchase order in your own system, not in Exact, counts as an invoice without an Exact purchase order. Its match in your own system is not updated automatically. ## Changing an invoice without an Exact purchase order Click **Change**. The invoice opens in the normal invoice screen, editable again. A banner says **You are changing a booked invoice**. Edit everything as usual: the supplier, the invoice number, the dates, the period, the payment terms, and every line with its ledger account, cost center, amount and VAT. You can add and remove lines. Click **Save in Exact**. It takes the place of **Send**. Glimps sends only what you changed, then reads the booking back from Exact. Nothing reaches Exact until you click **Save in Exact**. If you close the screen first, your changes stay in Glimps. The card then says **You have changes that are not in Exact yet.**, and **Continue** opens them again. **Undo changes** in the banner puts the invoice in Glimps back as it is booked. Exact does not change. ### What Glimps refuses Glimps checks these before it writes anything to Exact: * The lines must add up to the invoice total. * An invoice cannot become a credit note, or back. Delete the booking and book again. * The currency cannot change. Delete the booking and book again. * A booking needs at least one line. To remove everything, delete the booking. * A new period must exist in Exact and be open. * Exact keeps at most 60 characters of the description and 30 characters of the invoice number. * If someone changed the booking in Exact after you started, undo your changes and start again. ## Changing an invoice booked against an Exact purchase order Click **Change**. The **Change booking** panel opens, with the values **Live from Exact** in three sections: **Invoice**, **Payment** and **Lines**. You can change the **Description**, **Your ref. (supplier invoice number)**, **Remarks**, **Due date**, **Payment condition** and **Payment reference**. A changed field shows the value it replaces. Click **Save in Exact**. Glimps confirms with **Changed in Exact** and lists each change, old to new. The lines are shown, but they stay as booked. Glimps cannot change the lines of a purchase order invoice in Exact. To change them, do it in Exact itself. A different payment condition can make Exact calculate a new due date. ## When the money of an approved invoice changes If you change the amounts or the supplier of an invoice that is already approved, **Save in Exact** first asks **This invoice is already approved**. You choose: | Choice | What happens | | - | - | | **Ask for approval again** (recommended) | Glimps holds the payment in Exact first, then asks for approval again. The payment is released after the last approval. | | **Save without new approval** | The change goes to Exact under the approval that was already given. Glimps records that you chose this. | When you ask again, Glimps asks **Who needs to approve again?**: * **The same approvers**: the same people, in the same order as the first approval. * **Choose someone else**: an approval flow, a colleague or a group, as when you book. You can add a message. If asking again fails, the change is still in Exact and the payment is released as it was approved. Glimps tells you. Opening a booked invoice to change it does not add an approver from your approval rules. Its approval only changes through this choice. ## Deleting the booking Click **Delete booking** in the banner. Glimps deletes the booking from Exact, and you choose what happens to the invoice: * **Back to the dashboard**: the invoice returns to the dashboard, where you check it and send it as a new booking. Approval is decided again. * **Delete completely**: the invoice is removed from Glimps too. Use this for a duplicate or a wrong invoice. You can only delete a booking while it is open, unpaid, and in an open period, and only for an invoice without an Exact purchase order. A new booking starts with an empty change history. A booked invoice cannot be deleted with **Delete** on the dashboard. If it was booked while your screen was open, Glimps says **Already booked** and leaves it where it is. Use **Delete booking** instead. ## When a change is not possible If nothing can change, the card says **Cannot change now**, with the reason and what to do. Fix it, then click **Check again**. | Reason | What to do | | - | - | | The period is closed in Exact | Reopen the period in Exact and check again, or correct the difference with a credit note or journal entry in an open period | | The booking is processed in Exact | Correct the difference with a credit note or journal entry | | Another invoice in Glimps is recorded against the same booking | Unlink or delete the duplicate invoice, then check again | | The booking is no longer in Exact | It was probably deleted there. Check Exact | | The Exact connection has expired or lacks permissions | Reconnect under **Settings > Integrations** | | Exact is busy, or did not answer | Wait a minute and check again | ### Paid, or in a payment batch You can still change the description, the invoice number, and the ledger account, cost center and description of the lines. Exact refuses changes to the amounts, the VAT, the supplier and the payment terms. * In a payment batch: take the invoice out of the payment batch in Exact first, then check again. * Paid: correct the difference with a credit note. Glimps cannot see whether the VAT return for the period has been filed. Check that before you change amounts or VAT in a period you already declared. ## What Exact answers | Message | Meaning | | - | - | | **Changed in Exact** | Glimps read the booking back. Exact now holds these values. | | **Exact refused the change** | Exact's own message follows. Your changes are still in Glimps. | | **Exact did not take the change as sent** | Part of your change is not in Exact. Try again, or undo your changes. | | **No clear answer from Exact** | Check again. Saving the same change again is safe. | ## The change history Every change you save appears on the card under **Changed from Glimps**. Each change shows the approval choice first, then the invoice fields, then each line by its number. The old value is struck through next to the new one. Click **Show all \[number] changes** to see the older ones. ## Invoices that are not booked yet If your company [books after approval](/approvals/book-after-approval), an invoice that waits for approval is in the archive as **Not booked yet**. It is not in Exact, so you change it as a normal invoice. Click **Change** on the **Change invoice** card, edit the invoice, and click **Send**. If it was already (partly) approved, Glimps asks the approvers again. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.