@user17577004491 wrote:
Its already Sept and if I submit the W4 this month, will I still have to pay penalties for late filing the previous quarters?
If you have your employer take out enough tax to compensate for the entire year, no, there would not be any penalties.
But if you start taking out an extra-large amount now (to compensate for the under-withholding for the first part of the year), you will want to change it to 'normal' in January.
