Documentation FS · payment
May e-invoice contain a payment link or QR code?
Short answer
Self e-invoice must be structured XML format. QR code can be according to official methodological materials Financial Administration of the Slovak Republic added as a separate annex or as part of a PDF annex. However, payment data should also be correct in the structured invoice fields.
Conclusion
Not legal advice. Machine-translated answer, not yet manually reviewed. For the exact wording, see the Slovak original.