US State Tax Form Updates

Montana MW-4

The Montana State Tax Form (MW-4) has been updated for 2024.

Field Added


  • Married filing jointly with both spouses working
  • Boolean (1, 0)

Field Modified

  • MT_tax_allowances is now being used for Line 4, Reduced Withholding to retain backwards compatibility. This field is no longer calculated.

Fields Removed

  • MT_allowances_yourself
  • MT_allowances_one_job
  • MT_allowances_spouse
  • MT_number_of_dependents
  • MT_head_of_household
  • MT_allowances_large_deductions

Released to Production: March 14, 2024