Hi, You do have many changes in 2022! There is a W-4 Calculator that will take you step-by-step through the worksheet,
https://turbotax.intuit.com/tax-tools/calculators/w4/
When you considering the sale of your home, you can refer to IRS Pub 523 if any of the gain will be taxable,
https://www.irs.gov/pub/irs-pdf/p523.pdf
The Form W-4 line 3 is for number of dependents, which you can leave blank if you are not wanting to include you son in the withholdings calculations which will result in more tax withheld from your paycheck.
Try the W-4 Calculator step-by-step process!
I hope this helps!
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