How it works, step by step.

When you create your account, add your company with its name, tax ID (NIF), whether you are self-employed (autónomo) or a company (sociedad), and where you pay taxes (common regime, Álava, Bizkaia, Gipuzkoa or Navarre). The tax ID is checked instantly and the registration is sealed.

In the Facturas tab, with a CSV of your issued and received invoices (download the template): date, class (emitida or recibida), number, tax ID, name, base, VAT rate, VAT amount, withholding, deductible and capital goods. For purchases from suppliers in other EU countries (advertising, software, services), exports or domestic reverse charge, fill in the «operacion» column and the agents place them in the right boxes. In Álava, Bizkaia and Gipuzkoa you can also upload the TicketBAI XML files from your invoicing software, one by one or in a ZIP. If your full accounting is connected, your invoices arrive on their own.

Only for invoices you receive. «Deducible»: s if it is a business expense whose VAT can be deducted; n if not (for example, a personal expense): its VAT is not deducted and it does not count as an expense in the income tax instalment. «Inversion»: s if it is a capital asset (a computer, a machine, a business vehicle): its VAT goes in its own box and, for income tax, it is deducted through depreciation, not all at once. Left blank, it is taken as deductible and not a capital asset.

Upload the CSV of movements your online bank exports, and the agents match every payment and every receipt with an invoice of the exact amount. Each quarter they flag payments of 30 € or more without an invoice, so no deductible expense slips through.

Yes, in the Preguntar tab (questions in Spanish): how much VAT you have this quarter, what is pending, when the next deadline is, how much you have invoiced or spent this year, who your main clients and suppliers are, whether an invoice is missing, or which official notices are open. We answer with your own data, which never leaves AIM ASESOR. If you manage several companies, the portfolio has its own Preguntar for all of them at once: what is due this week, who has pending items, which clients have no invoices, open notices or how much each one invoices.

On your company page, «Apoderamiento en la Agencia Tributaria» › step-by-step guide: you grant it in the tax agency's register of powers of attorney (if it covers official notices, your advisor confirms it), and it lasts up to five years. Record it in AIM ASESOR and we remind you two months before it expires, when it can already be extended.

In the invoice list, press «Borrar» on the wrong one and upload it again correctly. The deletion is sealed with what the invoice contained, and your taxes are recalculated straight away.

What the agents prepare when each period closes: quarterly VAT, the income-tax instalment, withholdings on professionals and rent, annual summaries, the third-party and intra-EU returns, and notices worth reviewing, such as a missing invoice or a withholding with an unusual rate. Each proposal explains what it is, the amount, the law and the deadline.

Your approval is sealed with your name and the time, and you get the filing sheet with the amounts in the order of the official form. Nothing is filed or paid without your approval.

Record on the sheet the receipt number the tax authority gives you and the date. The filing is sealed and the reminders stop.

By email, to you and your advisory firm: when a return is awaiting approval 7 and 2 days before the deadline, when it is approved but not filed 5 days before, and the day after it expires. On Mondays, if you wish, a summary of everything pending across your companies.

Yes. In your account, create the calendar link and subscribe from Google Calendar, Apple Calendar or Outlook: you get the deadlines of all your companies, with an alert three days before.

Record it in the Notificaciones tab with its reply deadline. We remind you before it expires, and when it arrived and when it was handled are both sealed.

On your company file, enter the email of your advisor's firm account. Once they accept, they see your company, prepare and approve with you, and record filings under their own authorisation. You can withdraw the authorisation at any time.

From your portfolio: import your clients with a CSV (name, tax ID and, optionally, legal form and territory), then the invoices of all of them in a single CSV with an «empresa» column holding each client's tax ID. The inbox gathers everything pending for all your clients by deadline, and in your account you set your firm's brand so your clients see it.

Every act (registration, import, approval, filing) is chained to the previous one with a cryptographic fingerprint. If anyone changed a past act, the chain would break and it would show. Anyone can check a seal at /verificar.

Yes, whenever you like. From your account you download a ZIP with everything for each company, including a program to check the record's chain without AIM ASESOR. Your data is stored in the European Union and it is yours.