Line 3b: Copy the total claims from Part 2 (nonpriority unsecured claims) from line 6j of Schedule E/F.
Line 3b pulls from line 6j of Schedule A/B, which is the total amount of certain types of unsecured claims (the total is calculated by adding lines 6f through 6i together on Schedule E/F).
To view full form instructions for Schedule E/F and see how line 6j is calculated, click here.