Hi there, heazim1 and DEVINR. 

Yes, Step3: Claim Dependents is where you can enter the dollar amount based on the tax estimator. We depend our tax calculation based on the IRS guidelines and what you entered on the employees tax details. 

I'll be attaching the articles again on how we calculate taxes and the Publication 15 (2020), (Circular E), Employer's Tax Guide. 

Feel free to get back to me if you need more help. Take care always!