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-employee-s-withholding-certificate/00/1189006
https://www.irs.gov/pub/irs-pdf/fw4.pdf
https://www.irs.gov/individuals/tax-withholding-estimator
report more exemptions on your new W-4 , and less tax will be withheld.
Don't go overboard.