Onboarding Guide

Switching from Taxdoo to Marosa is a simple, guided process. Our onboarding team ensures that every step — from Power of Attorney transfers to VATify setup — is handled smoothly, professionally, and on time. We'll work directly with Taxdoo to reduce admin effort, preserve historical accuracy, and ensure you’re fully ready well before 1 May 2026.

How it works

Step 1
We prepare the Power of Attorney

After you sign up, you'll get an onboarding email within 7 business days. We will prepare all necessary Powers of Attorney and forms for each country, along with clear signing and submission instructions. The quicker you return the PoAs, the sooner we can proceed with your registrations and filings.

DISCLAIMER: No PoA required for Austria and the UK.

 

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Step 2

VATify Account Setup

We activate your VATify account and guide you through providing the initial information we need. If applicable, we’ll also help you connect your Amazon account for automatic data transfer.

This ensures your data begins flowing smoothly from day one.


 

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Step 3
Submission to the Tax Authorities

After receiving your signed PoAs, we'll submit them to the relevant Tax Authority and keep you updated on the status in each country. We manage all communication and follow-up with the Tax Authorities on your behalf.

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Step 4
Activation and Handover
 

Once all PoAs are approved and your data flows are active, your account is fully set up. Your VAT compliance is now active, stable, and ready for your next filing cycle.
Your onboarding specialist confirms your first filing dates and introduces you to your Account Management for ongoing support.

 


 

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Power of Attorney 

 

Use our PoA Summary Guide to see which documents you'll need for your transition.

 

You don't need to worry about those with a tick (✅): Taxdoo will share them with us.

Legal representative information
Active
Full name
imagen-1
Email address
Active
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
imagen-1
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
imagen-1
Trade register ( < 1.5 months)
Active
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
Active
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
Active
Local Tax Number ✅
Active
VIES number (VAT ID) ✅
Active
Address
imagen-1
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
Legal representative information
Active
Full name
imagen-1
Email address
Active
Passport / ID copy
Active
Country of issuance of Passport / ID
Active
Birth date | Place of birth
Active
Nationality
Active
Passport/ID Number | Issued At | Issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
Active
Address
Active
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal
PoA and trade register once notarized and apostille, also need to be sworn translated to Spanish.
Legal representative information
Active
Full name
imagen-1
Email address
imagen-1
Passport / ID copy
imagen-1
Country of issuance of Passport / ID
imagen-1
Birth date | Place of birth
imagen-1
Nationality
imagen-1
Passport/ID Number | issued At | issued By | Expiry Date
Company details
Active
Full company name
imagen-1
Local Tax Number
Active
VIES number (VAT ID) ✅
imagen-1
Address
imagen-1
Trade register ( < 1.5 months)
imagen-1
VAT registration effective date
imagen-1
Company online credentials to tax portal