Hi Donna Fowler ,

Thanks for your post! The error you’re seeing (opening and ending tag mismatch: T4_AMT line 2 and T4slip) typically indicates that there’s a formatting issue within the XML file—specifically, one of the tags isn’t properly matched or structured.

A good first step is to validate and review the XML file to identify exactly where the mismatch is occurring.

This guide walks through how to check and verify your file: Verifying the T4 or RL-1 XML file

You may also find it helpful to review the full process for preparing and submitting T4s electronically to ensure everything is structured correctly:

• How to file T4s electronically

If you’re receiving validation or upload errors, this article outlines common formatting issues and how to resolve them:

• Error: "Unable to process your file because it doesn't meet our format..."

If you haven’t already, it may also be worth opening a support ticket so our team can review the XML file with you in more detail, especially if the issue persists after validation.

If anyone else in the community has run into a similar XML tag mismatch error, feel free to share what worked for you.

Hi Donna Fowler ,

Thanks for your post! The error you’re seeing (opening and ending tag mismatch: T4_AMT line 2 and T4slip) typically indicates that there’s a formatting issue within the XML file—specifically, one of the tags isn’t properly matched or structured.

A good first step is to validate and review the XML file to identify exactly where the mismatch is occurring.

This guide walks through how to check and verify your file: Verifying the T4 or RL-1 XML file

You may also find it helpful to review the full process for preparing and submitting T4s electronically to ensure everything is structured correctly:

• How to file T4s electronically

If you’re receiving validation or upload errors, this article outlines common formatting issues and how to resolve them:

• Error: "Unable to process your file because it doesn't meet our format..."

If you haven’t already, it may also be worth opening a support ticket so our team can review the XML file with you in more detail, especially if the issue persists after validation.

If anyone else in the community has run into a similar XML tag mismatch error, feel free to share what worked for you.