You can make adjustments (ex. You could reduce or remove “other income” sources from the calculation), but you should know these types of changes will reduce the accuracy of your estimated refund or amount of tax due. This is especially significant if you’re entering information for multiple jobs.
Note: “Other income” is used in combination with wages from the highest paying job to calculate your level of withholding. Wage information from other jobs will not consider other income, deductions, etc.