
28 March 2026
By Dr. Hamed Molatefi, tax adviser · Reviewed 24 October 2026
For many businesses, the Taxpayers' System feels like a dark room: they know they must enter, but they do not know where the first key is. A rushed start usually leads to incorrect invoice issuance, discrepancies with the books, and end-of-period anxiety. A calmer path is to first create a clear picture of the current situation and then connect the tool.
The first step is to understand the work folder. The taxpayer must know their role in the system, whether their identity information is correctly registered, and whether branches or fixed counterparties need separate definitions. Many subsequent errors begin from this very point: an incomplete postal code, an incorrect role, or an organizational unit that exists in practice but is not visible in the system.
The second step is to understand the sales flow, not the software menu. Ask whether you sell goods or services, whether sales are cash or credit, whether the buyer is an end consumer or another taxpayer, and whether sales returns and discounts are common in your daily operations. The invoice template must match this reality. If the wrong template is chosen, subsequent corrections will take time and effort.
The third step is to standardize items and units of measure. The description of goods must match the warehouse and internal invoice. A minor difference in title or unit may seem insignificant to a human but appears as a discrepancy to the system. This is where it pays to prepare a master list of goods and services and use it as the basis for issuance.
The fourth step is the timing of issuance. An electronic invoice only makes sense if it does not have an unreasonable gap from the moment of sale. Accumulating paper invoices until the end of the month both creates the risk of penalties and makes inventory control difficult. A simple daily or at most multi-day procedure is better than a last-minute cram session.
The fifth step is to reconcile the system with accounting. If the accountant sees one report and the system shows another, the problem is not technical; it is a lack of common language. A short pilot period with a limited number of invoices, before full migration, helps identify discrepancies.
In the first consultation session, we usually pose three questions: Is the work folder healthy? Does the invoice template match the type of activity? And does the finance team know when and with what documentation they must issue? If the answer to all three is clear, connecting the software is the next step, not the first.
Tax transparency is built from these calm details. The goal is not to show speed; the goal is that at the end of each period, the sales figure in the system matches the figure in the file, and you know why it is so.
Frequently Asked Questions
What is the first step to enter the taxpayers system?
The first step is to understand the work folder. The taxpayer must know what role they have in the system, whether their identity information is correctly registered, and whether branches or fixed counterparties need separate definitions.
How to choose the invoice template in the taxpayers system?
You must understand the sales flow: whether you sell goods or services, whether sales are cash or credit, whether the buyer is the final consumer or another taxpayer, and whether sales returns and discounts are repeated in daily work. The invoice template must match this reality.
When is the right time to issue electronic invoices?
An electronic invoice is meaningful when it does not have an unreasonable distance from the moment of sale realization. Accumulating paper invoices for the end of the month both creates the risk of fines and makes inventory control difficult. A simple daily or at most a few-days routine is better than a last-minute exam project.
Official sources
Check the latest rules and deadlines on the official websites:
This article is for general information and education only and is not a substitute for professional advice. Laws and circulars can change; check the latest regulations or consult a tax adviser before making any decision.
Related articles
- What Is an Electronic Invoice and Who Must Issue It?
- Simple Guide to Registering in the Taxpayers' System for Small Businesses
- Tax Assessment Notice Has Arrived; What Should You Do Before Taking Any Action?
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