Changing my wifes W4

[s3nna]

If I am unemployed but my wifes w4 states that she is lesser of of the two can I switch it to her making the most income now.

[SusanC6]

A Form W-4 can be updated at any time.  When there is a financial change in the household, you should consider if the W-4 should be updated.

The Form W-4, Employee's Withholding Certificate was redesigned in 2020 as a result of the Tax Cuts and Jobs Act (TCJA) of 2017.  The new form considers all sources of income, including multiple jobs or a spouse's income to determine the correct withholding. 

When updating your wife's, you will want to take into consideration the changes in your household income.

The IRS has a Tax Withholding Estimator to help employees accurately calculate their withholding.  IRS Withholding Estimator