Itr-2: schedule tds 2: can you explain columns

in the new ITR-2, there are 3 columns in schedule TDS 2: 6) Amount b/f, 7) TDS of the current fin. year 8) In own hands

can you explain these columns with some example.

Suppose, I got an interest of 20000 rs., TDS deducted by bank was 2000, and if I was in 30% slab, I paid 3000 as advance tax and 1000 as self assessment tax. Now, tell me that what should be the values of these columns.