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The new posting date must not be smaller than the last date used for the sales tax book section AIT

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Posted on by SS-29050858-0

Hello everyone,

While trying to post a vendor invoice according to the usual standard process, I just received this error message that I’ve never seen before :

The date on the “Sales tax transactions” screen matches the posting date selected on the vendor invoice header.

This is an urgent issue that we need to fix ASAP in prod that is preventing us from posting this invoice.

Could you please help us ?

Looking forward to your feedback, thank you all.

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Dynamics 365 Finance

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H.M.Burhan 447 Super User 2026 Season 1 on at

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Hi,

It appears that the Italian sales tax localisation is enabled in your environment.

Please review the following Microsoft documentation and verify your configuration.

https://learn.microsoft.com/en-us/dynamics365/finance/localizations/italy/emea-ita-fiscal-books

Additionally, you can check the settlement period in the Tax module. It’s possible that the October settlement period is closed for entries.

Cheers,

Burhan

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Sathish Kumar Palan... 388 Super User 2026 Season 1 on at

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Hi SS-29050858-0

This could be posting date on the invoice may fall outside the active settlement period defined for the tax code.

Please check Sales tax settlement period

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SS-29050858-0 45 on at

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Hello Burhan, Hello Palanisamy ;

Thank you for your feedback.

However, I've checked the sales tax settelement periods, and the period of novembre is not closed while I do have pending vendor invoices in novembre, that I cannot post and I do have the same error msg for them as well :

Do you have any other suggestions please ?

Looking forward to your feedback.

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H.M.Burhan 447 Super User 2026 Season 1 on at

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Hi,

Since I don't have an environment where the Italy localization is configured, it’s difficult to visualize the issue. Could you please share an image of the Sales Tax Book section (AIT)? That will help us assist you better.

Cheers,

Burhan

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SS-29050858-0 45 on at

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Hello Burhan ;

Please find bellow a screenshot of the Sales Tax Book section (AIT) in our environment where the close sales tax book date is 10/31/2025 :

Looking forward for your feedback.

Thank you for your help,

Slim

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