Line 130 other income shows an amount. I already entered income in my T4 & T4A sections. T4A amount appears in my self-employed business net so why the amount on 130?

Boxes 26, 27, 28 and 30 on a T4A will go to line 130.  They will not rigger a T2125.  You may have had another box that did call up the 2125, but if you had data in any of those box numbers it goes to 130 for other income.  These boxes also go to line 130.