Which factor can increase the amount of a tax credit for a taxpayer?

The number of qualifying children is a significant factor that can increase the amount of a tax credit for a taxpayer. Certain tax credits, such as the Child Tax Credit, provide a specific amount of credit for each qualifying child. As the number of qualifying children increases, taxpayers can generally receive a higher total tax credit. This reflects the government's incentive to support families with children, promoting both financial relief and assistance for raising dependents.

Filing status typically affects the phase-out thresholds or eligibility for certain credits but does not inherently increase the credit amount itself. Employment history can impact eligibility for certain benefits or credits, but it does not directly affect the amount of defined tax credits like those associated with dependents. Previous tax returns may provide context for a taxpayer's overall financial picture but do not influence the calculation of available credits for the current year.