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Manuals

How to use Nanus, feature by feature

One page for every feature: what it is for, where to find it, how to use it step by step and what Nanus checks. In the app, short answers are in Help, behind the “?” button at the top.

Getting started

Set up your company, find your way around the app and reach any feature fast.

7 pages

  • Initial company setup

    The guided setup at first sign-in: business details, address and payments in a few steps, so you can issue your first e-invoice straight away.

  • Finding your way: menu, Home, search and shortcuts

    How the Nanus screen is laid out: the section menu, the Home page with your to-dos, the universal search bar and the keyboard shortcuts.

  • Use Nanus on a smartphone or tablet

    Nanus in your phone’s browser: the bottom bar, the Create button, the More panel, how to choose its items and how to add Nanus to your home screen.

  • Change language, dark theme and text size

    Choose the interface language (Italian or English), the light, dark or automatic theme, and larger description text.

  • The Nanus guided tour

    A one-minute walk through the main features, with a bubble next to each element. How to start it, move through it and replay it whenever you like.

  • What’s new and Nanus updates

    How new Nanus versions reach your browser and your computer, where to read what changed and how to find out which version you are using.

  • In-app help, support and feedback

    Find answers in the Nanus Help, open the help for the page you are on and write to the team to report an error, an idea or a question.

Invoices and sales

E-invoices, credit notes, delivery notes, sending to the SDI and counter sales.

20 pages

  • Create an e-invoice

    How to prepare and issue an Italian e-invoice: customer, lines, VAT, payment terms and the checks run before sending it to the SDI.

  • Document types TD01-TD29

    What the Italian e-invoice document types (TD01, TD04, TD24…) mean, when to use each one and where Nanus sets them.

  • Send an invoice to the SDI

    How to transmit an e-invoice to the SDI exchange system from your certified email (PEC) or through an intermediary, and what happens next.

  • SDI statuses: receipts and notifications

    What invoice statuses mean after sending (delivered, not delivered, rejected, accepted by a public body…) and what to do in each case.

  • Fix an invoice rejected by the SDI

    What to do when the SDI rejects an invoice: read the error code, fix the cause and transmit the invoice again.

  • Issue a credit note

    How to reverse all or part of an issued invoice with a TD04 credit note: returned goods, discounts, price errors.

  • Issue a debit note

    How to charge a customer an extra amount on an issued invoice with a TD05 debit note: price differences, interest, costs.

  • Deferred invoice from delivery notes

    How to group a customer’s delivery notes (DDT) into a TD24 deferred invoice, with checks on the deadline of the 15th of the following month.

  • Issue a delivery note (DDT)

    How to prepare an Italian delivery note: customer, destination, goods, reason, carrier, packages and weights, with the stock issue.

  • Accompanying invoice

    How to issue an invoice that travels with the goods, without a delivery note, with carrier, packages, weights and transport start in the XML and PDF.

  • Recurring invoices (fees and subscriptions)

    How to set customer, lines and frequency of fees, rents and subscriptions once and issue the invoices when they fall due.

  • Invoice a public administration (CIG, CUP)

    How to invoice an Italian public body: office code, CIG and CUP references, split payment and the public body’s outcome.

  • Stamp duty on invoices

    When the 2-euro virtual stamp duty applies to VAT-free invoices, how Nanus applies it automatically and how to charge it to the customer.

  • Invoice in a foreign currency

    How to invoice a foreign customer in dollars, pounds or other currencies, with the exchange rate and euro equivalent required for Italian VAT.

  • Withholding tax and pension fund

    Invoices and fee notes for professionals: withholding tax, a second withholding, pension fund contribution or INPS recharge and net amount due.

  • Email the invoice PDF

    How to email the customer the PDF courtesy copy, one invoice at a time or several together, with subject and text already proposed.

  • View the e-invoice as the Revenue Agency shows it

    How to view and print an e-invoice with the official Italian Revenue Agency stylesheet, exactly as the recipient sees it.

  • Invoice list: search and bulk actions

    How to search and filter invoices, read the totals and print, download or email several invoices at once.

  • Duplicate or delete an invoice

    Redo an invoice starting from an old one, and delete a draft or a rejected invoice, undoing due dates and stock movements.

  • Counter sales and day closing

    Record shop sales with a barcode reader, invoice on request, cancel, handle returns and close the day.

Quotes and orders

Quotes, pro forma invoices, customer orders, fulfilment and online shops.

6 pages

Purchases

Supplier invoices, self-billing, purchase orders and reordering.

8 pages

  • Record a supplier invoice

    How to record a supplier’s XML or p7m e-invoice in purchases, or a paper invoice by hand, with stock receipt and due dates.

  • Receive supplier invoices from PEC

    How to bring the invoices the SDI delivers to your PEC mailbox into Nanus and record them in purchases with one click, or discard them.

  • Open an XML or p7m e-invoice

    How to view, print or save as PDF an XML or p7m e-invoice, or a ZIP received by PEC or from the tax drawer, without saving it in Nanus.

  • Issue a self-invoice or integration (TD16-TD29)

    Integrations and self-invoices for reverse charge, foreign purchases, plafond overrun, gifts and regularisations, from the supplier invoice or from scratch.

  • Order from a supplier and record goods received

    How to create a purchase order, send it as PDF or by email, record deliveries with the supplier’s delivery note and link their invoice.

  • Ask suppliers for a quotation

    How to send a request for quotation to one or more suppliers, record the quoted prices and turn the best offer into a purchase order.

  • Reorder products below minimum stock

    How Nanus works out which products to reorder from stock, committed and incoming quantities, and creates one order for each preferred supplier.

  • Import a supplier price list

    How to load a supplier’s CSV or Excel price list to update codes and purchase prices on your products, with a preview before saving.

Customers and suppliers

Contacts, import, VIES check, letters of intent, agents and banks.

7 pages

  • Add a customer or supplier

    How to create a customer or supplier record with the data an Italian e-invoice needs: VAT number, recipient code or PEC address.

  • Import customers and suppliers from Excel or CSV

    How to load your customer and supplier list from a CSV or Excel file, with a row-by-row preview and checks for errors and duplicates.

  • Check a VAT number in VIES

    How to check from the customer record that an EU VAT number is valid in VIES and keep the result as evidence for intra-EU supplies.

  • See a customer or supplier overview

    Sales and purchases for the year, what is left to collect or pay, overdue amounts, open items and the latest documents, at the top of the record.

  • Record a letter of intent

    How to record a habitual exporter’s letter of intent (dichiarazione d’intento): Nanus cites it on N3.5 invoices and tracks the remaining ceiling.

  • Manage sales agents and commissions

    How to create sales agents, assign them to customers, calculate commissions on invoices and settle them with Enasarco and withholding tax.

  • Bank list: ABI, CAB and BIC

    How Nanus recognises the bank from an IBAN and how to add branches, BIC codes and foreign banks to the list, by hand or from a CSV file.

Items and stock

Items, price lists, variants, serial numbers, warehouses, movements and stocktaking.

13 pages

Due dates and payments

Due dates, collections, reminders, RiBa and SDD, bank reconciliation.

7 pages

Accounting

VAT registers, VAT settlements, cash book, withholding tax, Intrastat and reports.

11 pages

Settings

Company details, SDI, printing and email, users, imports, backups and integrations.

13 pages

Account and security

Sign-in, passwords, passkeys, multiple companies, plans, desktop app and support.

9 pages