#🧾Taxes
Estimated time: 12 minutes
Level: 🟡 Medium
Simplified tax obligations
📅 Functional Status
🚧 UNDER DEVELOPMENT
We are working to become a fiscally complete ERP. Some features are still in development.
Available now:
- ✅ VAT calculation on invoices
- ✅ VeriFactu (fingerprint, XML, QR; AEAT pre-production shipping with certificate)
Coming soon:
- 📅 Model 303 (Q2 2026)
- 📅 Model 347 (Q2 2026)
- 📅SII Record Book (Q2 2026)
🎯 What to see here?
PoolControl helps you prepare the information for the Treasury, but:
⚠️ IMPORTANT:
Always validate with your manager/management before presenting.
They are the tax experts.
📊 VAT Summary (Available)
In Accounting → Taxes → VAT you see:

Captura con datos demo AquaDemo.Capture with AquaDemo demo data.
📋 Form 303 (Quarterly VAT)
Status: 📅 Coming soon - Q2 2026
Model 303 is the mandatory quarterly VAT declaration for every businessman.
What will be included:
| Quarter | Period | Deadline | Status |
|---|---|---|---|
| 1T | January-March | ~April 20 | 🚧 In development |
| 2T | April-June | ~July 20 | 🚧 In development |
| 3T | July-September | ~October 20 | 🚧 In development |
| 4T | October-December | January 30 | 🚧 In development |
Planned functionalities:

Captura con datos demo AquaDemo.Capture with AquaDemo demo data.Capture with demo manager user (AquaDemo data).
📋 VAT Registration Book (SII)
Status: 📅 Coming soon - Q2 2026
Mandatory for companies >€6M in turnover, voluntary for the rest.
Planned functionalities:
- [ ] Automatic sending of invoices issued to the Treasury
- [ ] Sending received invoices (purchases)
- [ ] Shipping status consultation
- [ ] Correction of erroneous shipments
- [ ] High/low in the SII system
📋 VeriFactu - Electronic Billing
Status: Operational in local broadcast and sent to AEAT pre-production (with certificate). Actual production blocked until approval.
Detailed documentation: VeriFactu — guía completa.
Implemented
- SHA-256 fingerprint and chaining when issuing invoice
- XML VeriFactu and download from detail
- QR in PDF
- R1 rectifications with reference to original invoice
- Immutability (do not edit issued invoices)
- Sending SOAP to AEAT PRE from the app (server with certificate + supervision)
Pending / restrictions
- XAdES signature (mandatory for production)
- AEAT production environment (
verifactuProduction) — blocked - Automatic export of the “logbook” (not yet available in UI)
📤 Export for Manager (Manual)
While we develop the automatic models, you can export:
Export to Excel:
Excel file structure:
HOJA 1 - INGRESOS
Fecha | Número | Cliente | Base | IVA | Total
---
---
---
|----------|--------------|---------|-------|-------
15/01/24 | A-0001 | Hotel Sol | 450,00 | 94,50 | 544,50
... | ... | ... | ... | ... | ...
HOJA 2 - GASTOS
Fecha | Número | Proveedor | Base | IVA | Total
---
---
---
|----------|--------------|---------|-------|-------
10/01/24 | F-0892 | Químicos Mar | 500,00 | 105,00| 605,00
... | ... | ... | ... | ... | ...
HOJA 3 - RESUMEN IVA
Tipo | Base | Cuota
---
---
---
---
--|-----------|--------
Repercutido 21%| 70.000,00 | 14.700,00
Soportado 21% | 40.000,00 | 8.400,00
... | ... | ...💡 Tax tips
Tip 1: Review quarterly
Don't wait until December. Check every quarter how you are doing.
Tip 2: Save everything for 4 years
The Treasury can ask you for proof up to 4 years later.
Tip 3: Anticipate payments
If you see that you are going to have to pay a lot of VAT, save money.
Tip 4: Professional advisor
Software helps, but a manager will save you trouble and money.
❓ Frequently asked questions
"Does PoolControl render models directly?"
No. Generate the data and files so that you or your manager can present them on the Treasury website.
"When will 303 and 347 be available?"
We are working on it. Forecast: Q2 2026.
"What happens if I make a mistake on the VAT?"
A supplementary declaration can be submitted by correcting it.
"Can I deduct VAT on everything?"
No. Only VAT on expenses related to the activity.
"What if I have negative VAT (to be refunded)?"
You can:
- Request a refund (it takes time)
- Compensate with subsequent quarters
✅ Current tax checklist
Until we have automatic models:
- [ ] Review quarterly VAT summary
- [ ] Export data for manager
- [ ] Deliver to your agency in time
- [ ] Submit form 303 (with manager)
- [ ] Submit annual form 347 (with manager)
🧾 Complying with the Treasury is mandatory
Do it right and you will sleep peacefully. Use the software, but trust your manager.
Full tax roadmap: Ver ROADMAP_ERP