NOTE: As detailed on the official Microsoft Lifecycle policy page, Microsoft Dynamics AX2012 and AX2012 R2 will reach end of mainstream support on October 9th, 2018.
Additional detailed information and FAQ can be found here. https://docs.microsoft.com/en-us/dynamics365/unified-operations/fin-and-ops/get-started/mainstream-support-ax-2009-2012
Extended support definition is found here: https://support.microsoft.com/en-us/help/14085
For Dynamics AX 2012 products, there is no extended hotfix support offered.
The announcement for Dynamics AX 2009 is here: https://blogs.technet.microsoft.com/dynamicsaxse/2018/01/11/dynamics-ax-2009-sp1-ending-support-in-2018/