Knowledgebase Support HMRC Useful links
Knowledgebase home
Tax Return Production
Accounts Production
Practice Management
VAT Filer
Anti-Money Laundering
Support home
Video Training Guides

Hot Topics
SimpleStep Guides
Release Notes
Known Issues

Service Status
Useful Links
What is MTD? Support for Accountants Support for Business
HMRC's MTD Timeline
Digital Requirements
TaxCalc's MTD Journey
MTD for Income Tax
MTD for Corporation Tax
MTD for Income Tax
MTD for Corporation Tax
Step-by-step Guide

What is Two-Factor Authentication?

Article ID: 3191
Last updated: 24 Sep, 2021

Two-Factor Authentication (2FA) allows you to add an additional layer of security to further protect sensitive data. It is a security process which means users must provide two separate authentication factors to verify themselves, firstly, a username and password, then a Personal Identification Number (PIN) that is generated using a separate authentication application. 

Please Note: You should only need to enter the PIN to log in once every 30 days on each device that you use. If you switch and connect to a different TaxCalc database you will need to enter a PIN when you switch back to a database/user with 2FA enabled.

In order to use two-factor authentication within TaxCalc, you will need to use a third-party authentication application if you don’t have one already, to provide the second factor of the authentication.

Please see the following Knowledgebase Articles for further information:

Article ID: 3191
Last updated: 24 Sep, 2021
Revision: 5
Views: 10906
This article was:  

Also read
item How to Set Up Two-Factor Authentication (2FA)
item How to Reset the Two-Factor Authentication Details
item Authentication Applications and How to Use Them
item "Authentication code incorrect, please try again." when logging into TaxCalc with Two-Factor Authentication (2FA) enabled.