If you need to amend your Corporation Franchise Tax Return, please make sure you use the correct version of Form M4X, Amended Franchise Tax Return/Claim for Refund.
Starting with tax year 2010, Form M4X is being updated annually; each update applies only to a specific tax year. As a result:
- To amend returns for tax years before 2010, continue to use the previous Form M4X that applies to all years prior to 2010 – and is labeled accordingly.
- To amend returns for 2010 and subsequent tax years, use the Form M4X specifically labeled for the tax year(s) you are amending.
- If you use tax preparation software, be sure to verify that the program is using the correct version of Form M4X for the year you are amending.
For current-year and previous versions of Form M4X, visit the Corporation Franchise Tax Forms page.
