@mgarry3416 - there is no longer an option for 'deductions' on the W-4 (and I think you mean 'exemptions") That changed in 2020. please review the current version of the W-4.
the W-4 mimics the tax return, so if the OP's income is less than their standard deduction, there would be no withholdings. this process takes the 'guessing' out of the pre-2020 process.
if the OP were to complete each W-4 the same way (file SINGLE), he is going to be well under withheld at year end) as there is no way to 'add one deduction'. It is critical that the OP follows the output of the IRS Withholding Estimator that I posted above.
www.irs.gov/pub/irs-pdf/fw4.pdf
