{"id":3678,"date":"2026-07-19T13:41:44","date_gmt":"2026-07-19T11:41:44","guid":{"rendered":"https:\/\/szabo.pl\/index.php\/2026\/07\/19\/possibility-to-issue-electronic-ksef-invoices-using-the-subiekt123-billing-software\/"},"modified":"2026-07-19T13:42:49","modified_gmt":"2026-07-19T11:42:49","slug":"possibility-to-issue-electronic-ksef-invoices-using-the-subiekt123-billing-software","status":"publish","type":"post","link":"https:\/\/szabo.pl\/index.php\/en\/2026\/07\/19\/possibility-to-issue-electronic-ksef-invoices-using-the-subiekt123-billing-software\/","title":{"rendered":"Possibility to issue electronic (KSeF) invoices using the Subiekt123 billing software"},"content":{"rendered":"<p>Subiekt123 is accounting and finance software that enables issuing invoices in the National e-Invoice System (KSeF). This function makes invoicing more efficient and compliant with applicable regulations and enables full digitisation of documents. Scope: Generating e-invoices \u2013 easy creation of electronic invoices that meet KSeF requirements. KSeF integration \u2013 the program automatically connects to the National e-Invoice System, allowing error-free transmission of issued invoices to the tax offices. Document management \u2013 archiving and searching issued invoices. Verification and validation \u2013 before sending, the system automatically checks the invoices for correctness. Reporting and analysis \u2013 users can generate various reports on their invoicing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>possibility-to-issue-electronic-ksef-invoices-using-the-subiekt123-bil<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[87,412],"tags":[],"class_list":["post-3678","post","type-post","status-publish","format-standard","hentry","category-en","category-opis-uslug-en"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/posts\/3678","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/comments?post=3678"}],"version-history":[{"count":1,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/posts\/3678\/revisions"}],"predecessor-version":[{"id":3692,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/posts\/3678\/revisions\/3692"}],"wp:attachment":[{"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/media?parent=3678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/categories?post=3678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/szabo.pl\/index.php\/wp-json\/wp\/v2\/tags?post=3678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}