On PartnerSource is the whitepaper available concerning the changes in the European “VAT 2010”.
This is important information since the update requires for most companies a minor upgrade on either Dynamics AX 2009, 2009 SP1 or 4 SP2.
For more details Dynamics AX:
You should prepare to install at least two software updates. One includes functionality for services to be included in the EU sales list. This update applies to all EU country/region localizations and is already available for download. The update is included in Rollup 3 for AX 2009 SP1 and AX 2009 RTM and is available as a hotfix for AX 4.0 SP2. The second update will be country/region-specific functionality containing the changes to EU sales list and/or VAT Declaration reports and files. If you need EU sales lists for multiple countries, you must obtain updates for each country/region. These become available when the local tax authorities publish details for the specific country/region.