How to communicate invoices to the AT and view the history

What is it for?

The invoices issued in a month must be communicated to the Tax and Customs Authority (AT) by the deadline in the following month. fiscaldoo counts, month by month, how many documents are still to be communicated and shows the deadline. It also keeps one line for every communication made (invoices, delivery notes and other exchanges with the AT): when, by which channel, in which environment and with what response.

Issuing and communicating are different things. An invoice can be issued and printed without being communicated; it stays “to communicate” until the month's communication is recorded.

When to use it?

• At the start of each month, to see what is still to be communicated for the previous month and by when.
• To confirm that a month has been fully communicated (0 of … to communicate).
• To find out when and how a specific invoice was communicated, for example when your certified accountant asks.

Where to find it?

Accounting › Declare › Tax Authority › What is there to do with the obligations?, at the bottom of the page, under Supporting lists:

• Communication deadlines: one card per month, with the deadline and what is missing;
• Communications with the Tax Authority: one line per communication, from any service.

The administrator finds the same lists in Settings › fiscaldoo · Certification, group Configure the certification: communication with the AT (AT communications and Invoice communications).

Before you start

• Your profile is Accountant or higher. The steps were done with the Accountant profile. The Billing profile does not have the Accounting app and cannot see these lists.
• The month's invoices have been issued. A draft does not count.
• To communicate the month, the month's SAF-T file must generate without errors: How to generate the billing SAF-T file.

How to use it

1. Open Accounting › Declare › Tax Authority › What is there to do with the obligations? and, under Supporting lists, click Communication deadlines. Communication deadlines opens, with one card per month and company, arranged in the Up to date and Pending columns.
2. Read the month's card: the period, the company, the Due date and how many documents are missing. In the example, on 29/10/2026, 2026-10 is in Pending, with Due: 05/11/2026 and 26 of 26 to communicate; 2026-09 is in Up to date, with 0 of 3 to communicate. October's number goes up with each document issued in the month: these 26 already include the simplified invoices and invoice-receipts issued in the tests of How to sell at the counter. The card recounts every time the list is opened.
3. Click the card to see the month: Period start, Period end, Due, Documents in the month, To communicate and Updated on (the time of the last count). At the top, the month's status: Late, Pending or Up to date.
4. To communicate the month, submit the month's SAF-T file and record the submission: How to communicate the month's invoicing to the AT. After Register the submission, the month's card changes to 0 of … to communicate and Up to date.
5. To see the history, go back to What is there to do with the tax obligations? (the name at the top left of the page) and, under Supporting lists, click Communications with the Tax Authority. The Communications with the Tax Authority list opens, with ID, Document, Service, State, Attempts, Sent At, Answered on, Transport and Environment. It has one line per communication from any service, not only invoices: in the demo, on 03/11/2026, there were 41 lines: 37 Invoice, 2 Transport guide (register) (the delivery notes from How to issue a delivery note), 1 EDI exchange (receive) and 1 Series (the communication of a document series). To see only invoices, open Filters and choose Invoices (37 remained). To count by service, group by Service.
6. To see a communication, click the line. The record has the Service, the Concerned document (in the example, Lançamento FT D26/28), the Transport, the Environment, the Attempts, Sent At, Answered on, the User who recorded the communication and the Request and Answer buttons. The Company field only appears to users who work with more than one company; with a single company, like the demo Accountant, the record is always the active company's.

Expected result

• The previous month is in Up to date, with 0 of … to communicate, before the deadline on the card.
• Each invoice of the month has an Accepted line in Communications with the Tax Authority, under the Invoice service. When the month was communicated through the monthly communication, the Transport is Manual (Portal submission recorded by the user) and the time is that of Register the submission.
• In the demo, the counts match: the Documents in the month from January to September 2026 add up to 37 (3 + 5 + 4 + 4 + 5 + 5 + 4 + 4 + 3) and the Invoices filter shows 37 Accepted lines. Without the filter, the list has more lines (41 on 03/11/2026), because it also includes delivery notes, EDI exchanges and series. Communicating does not create journal entries.

Important notes

The deadline is the one on the card

Each month's card shows the deadline fiscaldoo calculated: the 5th of the following month, moved to the next working day when it falls on a weekend or public holiday (in the demo, September 2026 has 06/10/2026 and August 07/09/2026). Communicate before that date. Pending validation by a certified accountant: legal deadline for communicating invoices, the weekend and public holiday rule, and the consequences of being late.

• What the lists do not see. The month's count only includes sales documents issued in the card's company. It does not count drafts or receipts: in October 2026, on 29/10/2026, the demo had 26 documents (FS POS26/1, five FT D26 invoices, FS D26/4 to FS D26/20 and FR D26/3 to FR D26/5) and the receipts RG D26/16 to RG D26/20 from the same month are not included. An empty list or a month Up to date does not prove that all sales were invoiced.
• In a company with no documents, the month's card appears in Up to date, with 0 of 0 to communicate (seen in an empty company created in the demo for this purpose). It only means that fiscaldoo has no documents issued in that month, not that the company has complied: if it sold and did not issue invoices, the card does not know.
• Communicating invoice by invoice, by webservice, requires the company's AT credentials: How to connect fiscaldoo to the Tax Authority. When this article was written, the demo did not have them: all history lines come from the monthly communication. Pending on-screen validation: communication by webservice (the demo server has no encryption key to store credentials) and whether it removes the need to submit the monthly file.

Common problems

The month is still “Pending” after you submitted the file on the Portal das Finanças

• Cause: submitting on the Portal does not change anything in fiscaldoo; you still need to record it.
• What to do: open that month's monthly communication, type the receipt reference and date, and click Register the submission (How to communicate the month's invoicing to the AT, steps 7 and 8).

I cannot find an invoice in the history

• Cause: the invoice has not been communicated yet (its month is Pending), it is a draft, or it belongs to another company.
• What to do: check the invoice's month in Communication deadlines and the company in the top right corner. In the list, choose the Invoices filter and search for the number in the Document column (for example, Lançamento FT D26/28).