How It Works
1) Connect & Enable You Tax Identification Number (TIN) for E-Invoicing:
+ Link FIRS TaxProMax (TIN enablement)
+ Sign in to InvoiceManager and click Connect TaxProMax.
+ We verify your TIN and enable e-invoicing with FIRS (MBS).
+ Add your company profile, logo, VAT/TIN, bank details.
2) Start Creating Invoices
+ Smart, FIRS-ready fields
+ Customer, PO/contract, delivery note.
+ Line items with HSN, quantity, unit price, VAT rate.
+ Discounts, withholdings, retention (if applicable).
+ Auto-calculated subtotals, VAT, grand total.
+ Error-proofing
+ Mandatory field checks in real time.
+ Automatic Schema validation against BIS Billing 3.0 UBL.
+ Warnings for duplicate POs, missing HSN, or invalid VAT math.
3) Validate with FIRS (Real-Time)
+ We send a standards-compliant payload to FIRS MBS.
+ Receive IRN (Invoice Reference Number) and CSID (cryptographic stamp).
+ FIRS-stamped PDF (with QR code) + structured UBL/JSON.
4) Send & Share your Invoices
+ Deliver the invoice your way (Email or WhatsApp)
+ Email the FIRS-stamped PDF to your buyer.
+ Share a secure link (view/download + verification QR).
+ Optional exchange via your FIRS
+ Buyers can verify IRN/CSID instantly.
+ Version-controlled history for audits.
5) Track Payments & Reconcile
+ From “Sent” to “Paid”
+ Track viewed, acknowledged, part-paid, and paid statuses.
+ Record receipts, match to invoice, auto-close balances.
+ Aging reports, DSO, and reminders.
+ Refunds & credit notes
+ Issue FIRS-compliant credit notes linked to the original IRN.
6) Report, Audit, Retain
One-click compliance
Filter by date, buyer, MDA, project, or tax period.
Export UBL/JSON, CSV, and stamped PDFs.
Audit trail for every edit, submit, and view.
7) Support for Multiple Roles
+ Finance/Accounts: create, validate, reconcile, report.
+ Sales/Project Ops: convert quotes to invoices; attach delivery notes.
+ C-Suite/Owners: dashboards, DSO, cash flow insights.
Smart Invoicing, Faster Payments, Total Compliance
Quick Links
Help & Support
If you are having challenges with this platform please contact;
support@invoicemanager.ng