A build-to-order bridge that transmits Zoho Books sales tax invoices to FBR digital invoicing and returns the invoice number and QR code onto the document your buyer receives. Built to order by ECOSIRE for Zoho One (build-to-order) — indicative price from $499.00 USD; request a quote for a scoped proposal.
A build-to-order bridge that transmits Zoho Books sales tax invoices to FBR digital invoicing and returns the invoice number and QR code onto the document your buyer receives.
Built to order
Under Pakistan's digital invoicing regime, a registered person cannot simply print a sales tax invoice and hand it over. The document has to be transmitted to the FBR digital invoicing system, and the invoice number and QR code returned by that system have to appear on the copy the buyer receives. Miss the transmission and you have issued a document that does not satisfy the requirement, however correct the arithmetic is.
Zoho Books is a capable ledger with a well-documented REST API, a workflow engine and Deluge scripting. What it does not have is any awareness of the FBR schema. There is no Pakistan digital invoicing connector, no place to store an NTN in a way the tax payload understands, no HS code on the item master, no province of supply on the transaction, and no concept of further tax, extra tax or sales tax withholding as separately reported amounts. So finance teams end up running two systems in parallel: they raise the invoice in Books, then re-key it into a portal or an intermediate spreadsheet, then paste the returned number back by hand. Every re-key is a chance for the Books sales register and the transmitted set to drift apart, and that drift only surfaces at return-filing time when nobody has the hours to spare.
ECOSIRE builds the missing piece as a fixed-scope project, delivered into your own Zoho organization. Nothing here is a pre-built product you download today. We scope your setup, quote a fixed price, build it, and install it.
The first half of this work is data, not code. We add custom fields to the Zoho Books Contact record for NTN or CNIC, registration status, buyer type and province, so the values are captured once on the customer and inherited by every transaction rather than typed per invoice. On the Item record we add HS code, unit of measure and rate description. On Invoice, Credit Note and Debit Note we add the fields the payload needs and the fields the response returns: sale type, scenario reference, FBR invoice number, QR payload and transmission timestamp.
Tax itself is modelled with native Zoho Books taxes and tax groups so that the sales register and the transmitted payload are derived from the same numbers. Further tax, extra tax and withholding are set up as distinct taxes rather than folded into a single rate, because the payload reports them separately and a blended rate cannot be unblended after the fact.
Transmission runs as Deluge custom functions attached to Zoho Books workflow rules, so the call fires at a defined lifecycle point you choose, typically on approval or on marking the invoice as sent. Calls go out with invokeurl through a named Deluge Connection, which means the FBR token lives in the connection store and not in a script body that anyone with edit rights can read.
The payload builder is deliberately table-driven. Sale types, scenario references and tax category mappings live as records in a Zoho Creator app, not as literals in code, so when the published schema changes you edit rows instead of paying for a redevelopment cycle.
A rejected submission is more expensive than a blocked one. Pre-flight rules stop a document that has no NTN on a registered buyer, an exempt or zero-rated line with no reason recorded, a goods line with no HS code, or a rounding difference beyond tolerance between line tax and header tax. The user sees a specific message on the invoice, in Books, before the document is issued.
The returned invoice number and QR payload are written back to the invoice, the QR image is attached through the Books API, and a custom Zoho Books print template renders the number, the code and the timestamp on the PDF. Your team keeps working in Books; the compliant artefact comes out the other end.
Credit and debit notes are transmitted carrying the reference of the original document, taken from the source invoice rather than re-entered. Every attempt is logged: request payload, response payload, HTTP status, user and timestamp, in a Zoho Creator app with a scheduled function that re-attempts transient failures and escalates hard rejections by email to a named owner.
A monthly report compares the Zoho Books sales register against the set of accepted transmissions and lists the exceptions: issued but never transmitted, transmitted but rejected, transmitted with a value that no longer matches the current invoice. That list is short if the bridge is healthy, which is exactly why it is worth running.
Registered Pakistani businesses already running Zoho Books as their book of record. It suits distributors, manufacturers and B2B service firms with steady invoice volume, where re-keying is a daily cost rather than an occasional annoyance. It suits groups running several Zoho Books organizations under one holding structure, because the same mapping tables and the same log app cover all of them. If you also operate under the retail point-of-sale regime, that is a separate obligation with a separate technical path and we scope it separately rather than pretending one build covers both.
1. Scoping call. Forty-five to sixty minutes, screen shared. We look at your Zoho Books organization, your current tax setup, three or four real invoices including a credit note, your registration position and who controls your FBR credentials.
2. Fixed quote. You get a written scope, the field mapping, the assumptions, and one price. If the scoping call reveals your Zoho plan lacks the automation features this needs, we tell you before you commit rather than after.
3. Build. Typically two to four weeks depending on how many document types and entities are in scope. You get a mid-build checkpoint with working transmissions against the sandbox.
4. Install in test. Everything goes into a test Zoho Books organization first and runs against the FBR sandbox with your own scenarios. You transmit your own invoices and sign off on the evidence pack.
5. Production cutover. We are on the call for the switch to production credentials, the first live batch and the first credit note.
6. Support window. Thirty days of defect fixes and schema-change patches after go-live, with an optional ongoing arrangement after that.
ECOSIRE is not an FBR-licensed integrator and does not act as your tax agent. The bridge transmits from your Zoho organization using credentials issued to you, and responsibility for what is filed remains yours. We do not prepare or submit your returns. And there is no instant download or free trial: this is engineered per organization, and the first artefact you see is a quotation, not a zip file.
A short call to confirm the workflow, your platform version and where the integration boundaries sit.
You receive a written scope and a fixed price. Nothing is built until you approve it.
We develop against a copy of your configuration and test it there. Typically two to four weeks.
We install on your instance, hand over the source, and support it for twelve months.
Signs off the sales tax position every month and currently reconciles the Zoho Books sales register against a portal export by hand, discovering gaps far too late. The bridge makes transmission a by-product of raising the invoice and turns reconciliation into a short exception list instead of a full re-check.
Raises invoices all day and today re-keys each one into a second system, then pastes the returned number back onto the document. After the build they stay in Zoho Books, and a blocked invoice tells them exactly which field is missing before the document ever goes out.
Owns the Zoho org and has to keep it working when the tax schema shifts, without holding the whole integration in their head. They get commented Deluge, a mapping table they can edit as data, and a log that shows the exact request and response behind any disputed document.
| Criterion | ECOSIRE | Custom Build | Competitor |
|---|---|---|---|
| Transmits directly from Zoho Books with no re-keying into a second system | Included | Included | Partial support |
| Pakistan-specific validation before the document is issued | Included |
From $499.00
Starting point — quoted to your scope
| Partial support |
| Returned invoice number and QR rendered on the buyer copy automatically | Included | Partial support | Partial support |
|---|
| Credit and debit notes linked to the original transmitted document | Included | Partial support | Partial support |
|---|
| Full request and response log with retry and escalation | Included | Partial support | Partial support |
|---|
| Sandbox rehearsal with your own invoices before production cutover | Included | Partial support | Not included |
|---|
| Schema mappings editable as data by your own administrator | Included | Not included | Not included |
|---|
| Commented source code handed over to you | Included | Included | Not included |
|---|
A build-to-order Zoho app that breaks a lump card-processor payout into its underlying charges, fees, refunds and chargebacks, and posts each to the correct Zoho Books account. Built for your processor and chart of accounts after a fixed quote.
A configure-price-quote engine built for your Zoho CRM: bundles, tiered pricing, margin floors and approval routing. Built to order for your rules, not sold as a ready-made download.
A build-to-order Zoho Books extension that suggests chart-of-accounts categorisation with a confidence score, routes low-confidence items to a bulk review queue and learns from every correction. Built for your org after a fixed quote.
A build-to-order scoring engine for Zoho CRM that trains on your own won and lost history, then writes conversion probability, score decay and a next-best-action back onto every Lead and Deal.