Because of the Tax Cuts and Jobs Act Tax Reform Missouri had updated their withholding tables in March, 2018.
The Missouri DOR has continued to monitor updates and identified that they needed to make a subsequent adjustment to the withholding tables.
The Missouri DOR is asking all employees to review their MO W-4 to ensure they have the appropriate amount withheld. If you pay Missouri estimated tax payments you will need to review those as well.
It is not too late to do a withholding checkup for both Federal and State. But in order for it to take affect you need to do so very soon.
Please contact our office and we will be glad to assist you.