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@RealtaDana wrote:

 

 0 for exemptions. Then go to the "W-4" tab and check "FORM W4 2020/LATER" box

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I don't know what the problem and (and I don't use that program), but the 2020/later W-4 does NOT have "exemptions".  And the pre-2020 (or is it 2018 and before?) does not have Head of Household on the W-4.  So MAYBE entering "exemptions" is messing things up.

So can you try deleting it, and START with the 2020-later W-4 and Head of Household (don't enter exemptions) and go from there? 

Again, I have idea how the program works, but it is possible that entering "exemptions" is messing things up because that does not exist on the 2020/later W-4.  So it might be worth a try.