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Download an English PDF, check the key fields and give a foreign finance team a readable invoice visualization.

Analysis of the dispute over voluntary split payment in KSeF: where the technical invoice marking ends and the tax risk of overinterpretation begins.

Check what data to collect from a US counterparty, how to approach VAT, FA(3) XML, the KSeF number and a readable English version.

Learn when a final invoice is needed after an advance, how to deduct earlier payments and avoid settling the same sale twice.

LiveKid provides a PDF invoice, PDF correction and settlement, but does not send them to KSeF. See how to turn a PDF into FA(3) XML and submit the invoice to KSeF.

You sent an invoice to KSeF, but you do not know whether it has been accepted, is still being processed, or was rejected? Check the status, reference number, KSeF number and UPO step by step.

Follow the regular sales invoice process in KSeF: document type, invoice data, XML FA(3), validation, submission, KSeF number, and UPO.

How to handle an advance payment in FA(3), when a settlement invoice is needed, and how to keep the KSeF number, UPO and corrections connected.

Learn what the KSeF number is, how it differs from the P_2 invoice number, where to find it and how to use it in UPO, JPK and payments.

When to issue B2B invoices, how to receive costs, track UPO, KSeF number and accountant collaboration.

Cannot see UPO after submitting an invoice to KSeF? Check status, KSeF number, session, rejection errors and UPO download paths in the app, API or KSeFGPT.

Check when reducing a KSeF invoice to zero is justified, and when it is safer to correct the specific error instead of creating unnecessary VAT risk.