Change an employee's tax code using the IR Secure mailbox

Solution Properties

Solution ID:

250402084827527

Last Modified Date:

Tue Jun 30 14:18:12 UTC 2026

Taxonomy Path:

Case category//How do I...//processing

Author:

[email protected]

Change an employee's tax code using the IR Secure mailbox

Description

If HMRC sends you a P9 or P6 notification to change an employee's tax code, you need to apply it in your software.

NOTE:

If a tax code notice has an X after the code, this typically means you need to set the week1/month1 flag. Contact HMRC for advice if you're not certain what tax code to enter.

Cause

Resolution

IR Secure Mailbox Notification

If you haven't used the HMRC Mailbox before, check whether you've enabled electronic notifications with HMRC.

Follow the steps below to apply the notification:

Go to e-Submissions, then select IR Secure Mailbox.
Select the P6 or P9 notice as required.
Select Apply.

If the HMRC notification included a Tax Code start date in the future, your software automatically set this date.

Sage 50 Payroll only applies to the new tax code when your Process date is on or after the Effective From date on the notification.

[BCB:94:Sales - P11D software:ECB]

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