How do I change my withholdings to include my children, my husband and I as dependants so less federal taxes are taken out?

[xmasbaby0]

A spouse cannot be claimed as  a dependent, but you can change your withholdings by giving a new W-4 to the employer.

https://ttlc.intuit.com/community/tax-topics/help/what-to-know-about-the-new-2020-irs-form-w-4-emplo...

https://www.irs.gov/pub/irs-pdf/fw4.pdf

https://www.irs.gov/individuals/tax-withholding-estimator

[fanfare]

report more exemptions on your new W-4 , and less tax will be withheld.

Don't go overboard.