Your W-4 does not go to the IRS. It is only given to your employer(s) to tell them how much tax to withhold from your paychecks. You want enough withheld to avoid owing at tax time. If you are satisfied with the way you filled it out in November you can leave it alone. If you want more tax withheld, you can change it and give the employers a new W-4.
https://turbotax.intuit.com/tax-tools/calculators/w4/
https://www.irs.gov/individuals/tax-withholding-estimator
https://www.irs.gov/pub/irs-pdf/fw4.pdf
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
