It's not a ProConnect task. Try the many calculators on the web, they're all easier to use than the IRS worksheet.
IRS: https://www.irs.gov/individuals/tax-withholding-estimator
Others:
https://www.investopedia.com/articles/personal-finance/081214/filling-out-your-w4-form.asp
https://www.nerdwallet.com/article/taxes/how-to-fill-out-form-w4-guide#W-4%20withholding%20calculato...
I would donate bone marrow to a client if our DNA matched, but I try to find a way out of doing W4 work.
