Congrats on the decision!
We're adopting from China so it may depend where you're adopting from.
We needed the last 3 years tax returns as well as:
Here's what our financial form asks for:
Annual Household Salary Income for 2003 & 2004
Annual Household Other Income for 2003 & 2004
Life Insurance
Vehicles
Stocks/Bonds
Personal Property
Savings Accts
Checking Accts
Real Estate
Other
Other Investments
Total Assets
Credit Cards
Bank Loans
Home Mortgage
Total Liabilities
Net Worth
DH owns his own business as well and was really nervous. We didn't need to give any bank acct info or anything like that. Originially I thought we'd need to give them copies of bank statements, credit card bills, etc but we didn't need to. It was a 1 page form and 3 years tax returns. I really think it depends on where you're adopting from and what agency you use though b/c we have a different agency for our home study and it was a completely different form but needed about the same things.
Good Luck!
Traci