Bookkeepers are usually responsible for documenting or checking financial data for a company or client, including checks received or written, invoices, cost spreadsheets, and monthly or quarterly revenue. A bookkeeper is skilled at keeping documents and tracks a wide net of financial information. When a bookkeeper wants to leap to being an accountant, they will need to take the CPA exam, plus earn a bachelor's degree (most of the time), if they do not have one already. Fifty states plus the District of Columbia require accountants to earn 150 credit hours of college education before taking the national four-part Uniform CPA exam.