Final answer:
The Congressional Budget Office (CBO) is the agency responsible for providing Congress with fiscal analyses, including how tax dollars are spent, to aid in creating a more efficient government.
Step-by-step explanation:
The agency that provides Congress with information about how tax dollars are spent and how the government could be made more efficient is the Congressional Budget Office (CBO). The CBO, established by the 1974 Congressional Budget and Impoundment Control Act and created in 1975, is a nonpartisan agency that scores all proposed legislation to assess its net effect on the budget. It aids Congress by providing guidance on balancing the budget and has a key role in fiscal analysis and tracking the federal debt. Unlike the IRS, which collects taxes, or the DEA, which enforces controlled substances laws, the CBO focuses on budgeting and fiscal oversight for legislative decision-making.