Family Guy (1999) - 2x18 - E. Peterbus Unum

It's tax refund season, and everyone's cashing in except Peter! Tired of watching his neighbors buy expensive toys, Peter decides to get an accountant that can net him a profit. Satisfied that the new CPA will get him a huge refund, Peter announces to the family that he's going to use the money to put in a pool.

While excitement at the Griffin house grows, Peter goes to get a building permit. He's shocked to learn that the city codes do not allow swimming pools. Outraged, Peter digs deeper (so to speak) and learns that the county has no record of his land. Armed with this new info, Peter decides to declare his land a country and make himself the president!