Articles on: Sales Tax Autofile

How to setup Autofile for Missouri

This is a state-specific guide. Learn about setting up Autofile in general here.Just finished registration? Please read the registration guide first.


Find and Provide Sales Tax ID


Login to Missouri MyTax, and find your Sales Tax ID below.



Grant access to Missouri MyTax


Missouri MyTax requires merchants to grant access to third-parties. Please grant access to Sidr Tax by following the steps below.




Fill in the Sidr Tax third-party account information:

  • User ID: sidrtax
  • Registration Confirmation Number: 9901006728973

Click "Next".



Select the "View" check box on the left.

Put a early enough start date, for example, 01/01/2020.

Select Assignments: "Full Access".

Click "Save".



Review the Authorized Tax Type Functions and click "Confirm".



We will receive a notification once you grant us access and will review your account. After the review, we will activate your Missouri Autofile!



Updated on: 06/27/2025

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