We build it end to end
A defined scope, delivered in releases you can test. We own delivery from discovery to go-live.
Best for a new system or a rebuild
ServicesERP
We connect your ERP and billing systems to e-invoicing.
E-invoicing means each invoice is sent to the tax authority as structured data, not only as a PDF. We build the invoice generation, the connection to the tax platform and the link to your ERP, so billing carries on as before.
Request a quoteFrom our clients
A pre-engineered building manufacturer wanted the best ERP. We built it on ERPNext.
What you get
What we hand over
- 01
Invoices produced as structured data
Your ERP or billing system produces each invoice, credit note and debit note in the format the tax authority requires, with the tax fields filled from the order. The printed or PDF copy your customer receives comes from the same record.
- 02
A connection to the tax platform
The invoice is sent to the tax authority platform, or to the approved service provider that passes it on, and the reply is stored against the invoice. Rejected invoices are listed with the reason, so your accounts team can correct and resend them.
- 03
The link to your ERP
We build it inside the ERP where we can, so staff raise invoices the way they do today. For Odoo we have built the flow between two GST units of one company: purchase order, bill, e-invoice and delivery challan in one step.
- 04
Tax reports from the same data
Reports for returns and audits, taken from the invoices already in the system. For Indian clients we have built reports for GST, TDS and TCS.
How it works
Compliance added to the billing you already run
The dates of an e-invoicing mandate are fixed by the tax authority. The work is to get your systems ready before them without stopping the invoices that go out every day.
- 1We check your invoice data first: customer tax numbers, tax codes, units and addresses. Missing or wrong master data is the most common reason an invoice is rejected.
- 2We build the structured invoice and the connection to the tax platform, and test them in the test environment the authority or the provider offers.
- 3Sending happens in the background when an invoice is confirmed. The user sees the status on the invoice and does not need to use a second system.
- 4We go live before the deadline that applies to you, and support the system afterwards as the rules change.
Your options
Your options, compared honestly
- Alternative
The e-invoicing module of your ERP vendor
The simplest route when your ERP is a current version and the vendor supports your country. It does not help with an older or heavily customised ERP, or with invoices raised in another system.
- Alternative
A separate e-invoicing portal, used by hand
Quick to start and workable for a handful of invoices a month. Every invoice is then entered twice, once in your ERP and once in the portal, and the two can drift apart.
- Alternative
Waiting until the deadline is close
Costs nothing now. The dates do not move, and data clean-up and testing take longer than most teams expect.
- With KTree
Build it with KTree
One engineering team builds the invoice generation, the tax platform connection and the ERP link, on Odoo, ERPNext, Dynamics 365 or a custom system. We are doing this now for a company in the UAE. You own the code and the data.
Problems we have already solved
Not praise. The problem, what we built, and what changed.
Client
The problem
What we built
Result
Manufacturing · Multi-unit, India
Sales, production and site installation ran in separate tools, re-keyed by hand at every step.
One Odoo 18 flow from quotation to production orders to installation sign-off on site.
1 flowsales → production → installation
Technology
What we build it with
- E-invoicing
- UAE e-invoicing
- GST e-invoices (India)
- GST, TDS and TCS reports
- Odoo
- ERPNext
- Microsoft Dynamics 365 Business Central
- Tax platform API integration
Ways to work with us
A project, a team, or support for what you already run
Our engineers, your roadmap
Odoo, React, Node, React Native, AWS and PHP engineers who work as part of your team, month by month.
Best for a product that keeps growing
Keep it running
Maintenance, upgrades and urgent fixes for ERP, web and cloud systems, including ones we did not build.
Best for a system already live
Before you ask
Questions about E-invoicing
Short, straight answers. Anything else, ask in the form below and an engineer will reply.
What is e-invoicing?
An invoice sent as structured data that software can read, in a format set by the tax authority, and reported to that authority. Many countries now require it for sales between businesses.
We already email PDF invoices. Is that not an e-invoice?
No. A PDF is a picture of an invoice for a person to read. An e-invoice is data in a fixed format that the tax platform can check, so the system that raises the invoice has to produce it.
Do we have to replace our ERP?
Usually not. We add the e-invoice generation and the connection to the tax platform to the ERP or billing system you run. If the system is too old to extend, we tell you and show the options.
Which countries do you cover?
We are implementing e-invoicing for a company in the UAE, and we have built GST e-invoice flows for an Indian manufacturer on Odoo. For another country we start by reading its rules with you and confirming what your system must send.
When should we start?
As soon as you know the date that applies to your company. Cleaning the customer and tax data and testing with the tax platform both take time, and the deadline does not move.
Request a quote
Tell us what you are building.
A senior engineer replies within one working day.
- 1An engineer reads it. Not a sales desk.
- 2A short call. To understand the scope and what you run today.
- 3A written estimate. Scope, team and timeline on paper.
- Sales
- +91 77025 00973
- Office
- +91 40 6674 7261
- info@ktree.com
- Address
- Sanali Info Park, Road No. 2, Banjara Hills, Hyderabad 500034