Immutability
An accepted invoice cannot be edited or deleted. A correction is a tax credit note or debit note linked to the original clearance.
ERP to government RAMIS
The Bridge From Your ERP To RAMIS.
Each e-invoice moves from your ERP, through Invoz, into government RAMIS.
Your ERPs
- S/4HANA
- SAP ECC
- SAP B1
- IFS
- Dynamics
- Business Central
- Oracle
- NetSuite
- Odoo
- NAV
The product
Invoz
Government RAMIS
e-Invoice system
Each ERP sends its e-invoice into Invoz. From there it clears in government RAMIS.
A typical connection is live in 48 hours. The diagnostic fee is credited toward Invoz.
From the ERP
- SAP S/4HANA
- SAP Business One
- IFS
- Microsoft Dynamics
- Oracle
- Odoo
into government RAMIS
Exposure
What a direct connection leaves on the desk.
The serial
Gazette Extraordinary No. 2481/22 requires YYMMM_QQQQ_XXXXX. Each branch keeps its own sequence, and the sequence restarts each month.
The sanction
The VAT Amendment Act allows a fine of up to LKR 1,000,000 and imprisonment of up to six months for inaccurate records.
The gateway
IRD endpoints pause. A queue holds the invoice, retries with backoff, and keeps dispatch and checkout moving.
Clearance
Four steps from post to acknowledgment.
The billing system stays in place. Invoz numbers, checks, and submits, then writes the result back for the ERP to read.
- 01
Ingest
The ERP drops a finished CSV over SFTP, or a cloud ERP posts the invoice to the webhook.
- 02
Check
Nine-digit TINs, separate invoice and supply dates, the CBSL rate for foreign amounts, and VAT that agrees to the total.
- 03
Number
The branch sequence is allocated, then the payload goes to RAMIS over mutual TLS.
- 04
Return
A clearance writes an acknowledgment the ERP can read. A rejection comes back in plain language for the billing desk.
Product
What Invoz holds.
Gazette serials
Each branch of a legal entity has its own monthly lane. Colombo and Kandy can both issue 00041 in October, as 26OCT_CMB_00041 and 26OCT_KDY_00041.
Pre-flight checks
Seller and buyer TINs, supply dates, currency conversion, and line math are verified before anything is submitted.
File drop or webhook
Map the export columns once per legal entity. Older on-premise software can use a folder watcher. Half-written files are ignored.
Credit and debit notes
Schedule 04 adjustments reference the original clearance identifier. The accepted invoice stays as it was filed.
Inward matching
Schedule 02 records can be reviewed and approved in batches of up to 5,000, which keeps input VAT matched to the supplier invoice.
Rollout
Built for the mandated sectors.
Tea auction brokers
Since May 2026
High-velocity consignment sales, broker commissions, and producer credit notes.
Apparel exporters
Phase 1 · Q3 2026
Zero-rated export tracking and input VAT recovery after the end of SVAT.
FMCG and wholesale
End of 2026
Multi-depot serials, and delivery returns posted as Schedule 04 credit notes.
Financial services
Phase 2
The 20.5% financial-services rate across high volumes of recurring statements.
Retail and hospitality
2026–2027
Secured point-of-sale fiscalization, with a buffer so the counter does not wait on the gateway.
Mandate
The instruments the format rests on.
Gazette Extraordinary No. 2481/22
27 March 2026
VAT tax-invoice content, nine-digit TINs, separate invoice and supply dates, and the serial format.
Gazette Extraordinary No. 2500/106
1 October 2026
Moves the binding cutover from 1 July 2026 to 1 October 2026. The field rules stay the same.
IRD Notice SEC/PN/VAT/2026-03
4 May 2026
Real-time Schedule 01 output and Schedule 04 adjustments through the RAMIS Web API.
VAT (Amendment) Act No. 14 of 2026
30 June 2026
Reaffirms the LKR 60 million annual threshold and the sanctions for inaccurate invoices.
Demo
Book a demo.
Tell us who you are and which ERPs you run. Anything else can go in other notes. The request is saved and sent to the Invoz desk.