Jerry applies for individual disability insurance coverage with Kramer, his insurance representative. Kramer fills out the necessary forms but needs to obtain proof that Jerry's annual income is $120,000. What document will Kramer need to complete the application?

1. A personal letter from Jerry, dated, signed, and witnessed. 

2. Jerry's net worth statement. 

3. Jerry's most recent T1 general income tax return and Notice of Assessment. 

4. Jerry's most recent T5 slip