What changes when invoices go electronic
Under e-invoicing, an invoice is no longer just a document you print. It is built in a set electronic format, signed with a certificate that identifies you, given a QR code, and shared with the tax authority. Once issued, it cannot be edited or deleted; a mistake is corrected with a credit or debit note.
Most schemes roll out in waves, by company size or turnover. Read the rules for your own country and wave, note your deadline, and work back from it. The preparation below applies to almost every scheme.
Clearance or reporting: know which you face
Schemes use one of two models, and many use both. Under clearance, the invoice is sent to the authority before it is issued, and it is valid only once the authority accepts it. Under reporting, you issue the invoice yourself and send it to the authority within a set time afterwards.
Often the model depends on the buyer: invoices to businesses are cleared, while simplified invoices to consumers are reported. Clearance means your system must reach the authority at the moment of posting, so plan what happens when it cannot.
- Clearance: no valid invoice until the authority accepts it
- Reporting: issue now, send within the deadline
- Either way, a rejected invoice must be fixed and sent again
- Either way, a retried send must never create a second invoice
Clean the customer data first
Buyer tax numbers decide which kind of invoice you issue and whether it is accepted. A missing or mistyped number turns a business invoice into the wrong type, or gets it rejected. Start cleaning customer records months before the deadline, not the week before.
- Check your own registration details: legal name, tax number and address.
- Export every active business customer with its tax number and address.
- Check the format of each tax number and fill the gaps.
- Ask customers to confirm their numbers on their next order or visit.
- Stop new business customers being saved without a tax number.
TipGive one person ownership of customer tax numbers, so corrections go through one desk instead of every rep.
Signing devices and certificates
Each unit that issues invoices, whether a branch, a till or a server, usually has to be registered with the authority and given a certificate to sign with. Registration often includes a compliance test, where sample invoices, credit notes and debit notes must pass before real ones are accepted.
Certificates expire. When one lapses, that unit cannot sign, and invoicing stops. Keep a register of every device, who owns it and when its certificate ends, and renew well before the date.
TipPut every certificate’s expiry date in a shared calendar with a reminder a month ahead, and name a deputy for when the owner is away.
Every channel, including the van
Invoices leave a distributor from more places than the finance office: the sales desk, a showroom till and the reps’ vans. Each must produce a compliant invoice with its QR code on the printed copy, and each prints on different paper and printers.
Vans are the hard case, because they often sell without signal. Find out how your scheme treats an invoice made offline, and how your system gives it a QR code and sends it once the van reconnects. Test it where your reps actually lose signal.
- Test that office invoices show the QR code on the PDF
- Test that till receipts print it at the counter
- Test that van invoices print it on the rep’s mobile printer
- Test an invoice made offline, from sale to sync
Corrections: credit and debit notes
With e-invoicing you cannot cancel or edit an invoice after it is issued. A return, a price correction or a missed discount is handled by a credit note, and an undercharge by a debit note. Each note refers to the invoice it corrects, and is signed and shared like the invoice itself.
This changes habits. Staff who used to void and reissue an invoice must learn to raise a note instead, while the original invoice stays on record.
Test, train and watch
Run real scenarios before the deadline: an invoice to a business, a sale to a consumer, a return, an offline van sale and an invoice the authority rejects. Check what the authority answered each time and what your staff saw on screen.
After go-live, someone must watch rejections and warnings every day. A rejected invoice is not valid, so it must be corrected and sent again quickly, and a retry must never send the same invoice twice.
Checklist: E-invoicing readiness checklist
- Confirm your scheme, wave and deadline
- Find out which invoices are cleared and which reported
- Check your own registration details
- Check every business customer’s tax number
- Register each issuing unit and pass its compliance test
- Record every certificate’s expiry date and owner
- Test the QR code on office, till and van prints
- Test an offline van sale end to end
- Train staff to correct with credit notes, never edits
- Name who watches rejections every day