Retirement tax questions

The "other tax" comes from my 1099 2a/1040 15b correct? That is what I see on my form 5329 --- lines 1 and 3 are the same as 1099 2a/1040 15b. That amount is subject to the 10% tax on line 4 of 5329, correct?. That is then the "other tax"? Sorry - I am just trying to make sure I understand!