Your individual tax situation will determine how to fill out your W4. If you have one job and are single with no dependents, you only need to enter your information in Step 1 and check the box for Single. This will direct the employer to withhold the maximum amount based on withholding tables. In other words, complete Step 1 personal information and the check the box for Single and then sign the form in Step 5.
If your daughter's income does not exceed the federal threshold, she would not be required to file a return. In 2024, that threshold was $14,600 or earned income or unearned income (think interest and dividends) of $1,300. This year's threshold will be adjusted for inflation. If your daughter does have money withheld from her paycheck, she should file even if she does not have a filing requirement.
The Virginia income filing requirement for single is $11,950. For the Virginia Form VA-4, your daughter can choose either 1 or 0 in Box 1(a). Either choice will depend on whether you want to have a refund at the end of the year (then select 0) or choose for the personal exemption (1) to have less withheld each month. For one exemption and one job, your daughter's withholding should still match the annual requirement. If you are uncertain and do not want to risk the chance of a balance due at the end of the year, then 0 is a reasonable choice.
