Can you please let me know the version of Sage 100 you are using?  Go to Help > About

22.3.51.0 just updated it this morning.  

I believe you are using Sage 100 Contractor. Sage 100 Contractor forum can be found https://www.sagecity.com/support_communities/sage_construction_and_real_estate/f/sage-100-contractor

Moving this post to the Sage 100 Contractor forum in the Sage Construction and Real Estate Support Group.

Thanks,
Derek

We don't know why the tax tables seem to be different. We only know that the IRS made a change in taxes and how the federal withholding is entered so we follow those changes. As I am a support representative for Sage 100 Contractor, I tell my clients to look at the IRS.gov website where there is a tax estimator. This will tell them whether they are claiming correctly. You can then make changes on the W4 if you have already filled it out and trial compute until you get the taxes just right. The ONLY time the W4 should be filled out is if the employee wants a change in their taxes or you have a new hire.

Due to changes in the law, taxpayers can no longer claim personal exemptions or dependency exemptions; therefore, the 2020 Form W-4 no longer asks an employee to report the number of withholding allowances that they are claiming.

Employees who have submitted Form W-4 in any year before 2020 aren't required to submit a new form merely because of the redesign. Employers will continue to figure withholding based on the information from the employee's most recently submitted Form W-4. The withholding tables in Pub. 15-T allow employers to figure withholding based on a Form W-4 for an earlier year as well as the re-designed 2020 Form W-4.

Read Publication 15 for more info: https://www.irs.gov/pub/irs-pdf/p15.pdf

Also, Publication 15T explains how withholdings should be calculated: https://www.irs.gov/pub/irs-pdf/p15t.pdf

Walking through the steps in Publication 15T:

Using the 2019 W-4 (with zero allowances, and a $62,000 salary), I come up with a weekly federal tax withholding of $131.  ($6,812 for the year)

Using the 2020 W-4 (with zero dependents in step 3, and a $62,000 salary), I come up with a weekly federal tax withholding of $129. ($6,708 for the year)

If I use the IRS Federal Tax withholding estimator (and assume that this employee has no deductions, credits, 401k contributions, etc.), it estimates an annual tax obligation of $6,708.

So both methods should have similar results.  (Though I don't know how Sage Contractor actually calculates it for this hypothetical employee.)