KSeF in the Base.com system - how to prepare e-commerce for KSeF 2.0 

The National e-Invoicing System (KSeF) version 2.0 changes the way accounting documents are circulated in Polish e-commerce. For sellers, this means not only a technical obligation, but also the need to organise invoicing processes, integrate with accounting systems and automate operational work. In this context Base.com acts as a central tool that combines multi-channel sales with document handling and communication with KSeF. 

Base.com as an e-commerce invoicing hub 

Base.com provides a complete set of tools for efficient issuance and handling of accounting documents. From a single panel, you can generate invoices (and in the case of selected accounting integrations, also receipts) for orders coming from multiple sales sources: online shop, marketplace or foreign channels. 

A key advantage is centralisation of the process - Instead of handling documents in several systems, the entire process takes place in Base.com and is then transferred to KSeF 2.0 (ERP). 

Integration with KSeF 2.0 - how does it work in practice? 

Base.com's integration with KSeF 2.0 is designed to reduce manual operations and the risk of errors as much as possible. The system enables: 

• transmission of invoices created in Base.com directly to KSeF 2.0 (ERP) and the generation of documents specific to the accounting system on their basis,
• automatic export of invoices to KSeF 2.0 at the time of their creation or bulk manual export, if you prefer to retain full control over the moment of dispatch,

• downloading invoices from KSeF 2.0 and using them in automated emails to customers,

• transmission of invoices to selected marketplaces, such as Amazon, in accordance with their documentation requirements,

• rapid printing of accounting documents thanks to direct integrations with printers.

This makes Base.com the intermediary between sales and accounting, eliminating the need to manually export files or log into multiple systems. 

Automatic invoicing - saving time and scalability 

At Base.com, you can invoice: 

• individually, for selected orders,
• en masse, for the entire order list.

Importantly, the system can completely take over this process. Thanks to automatic actions Invoices can generate themselves on the basis of predefined rules, e.g. after a change in order status or payment confirmation. This solution is particularly important in high-volume e-commerce, where manual document issuance quickly becomes an operational bottleneck. 

Overseas sales and KSeF - how does Base.com simplify the process? 

For companies selling in foreign markets, Base.com offers additional value. The system enables: 

• issuing invoices in different languages,
• service different numbering series,
• use of different VAT rates depending on the market and type of sale.

This keeps the documentation consistent and at the same time meets local formal requirements, without having to manually adjust invoices for each market. 

Why prepare for KSeF 2.0 with Base.com now? 

KSeF 2.0 is not only a legal requirement, but also an impetus to clean up accounting processes in e-commerce. The implementation of integration with Base.com allows: 

• reduce manual work and errors,
• reduce order processing times,
• integrate sales, invoicing and accounting into a single ecosystem,
• prepare the company for further sales volume without increasing the operational team.

Base.com's KSeF 2.0 support is an example of how regulatory obligations can be turned into a real operational advantage. Central invoice management, automation of document issuance and direct integration with accounting systems and the marketplace make the invoicing process no longer a problem and become a stable part of scalable e-commerce. 

Don't have an account on Base? 

No problem! We offer comprehensive implementation support: from registration to configuration to the first sales steps. Thanks to our experience, you will do it faster, more efficiently and without unnecessary complications. The implementation service is a one-off and we will take care of all the formalities for you!

👉 Click here to create an account on Base 

Author of the blog: Karolina Kieremkampt
Date of publication: 14.01.2026r.