Hi, SSPN newbie here. Would be grateful if someone can help to clarify how is the interest for SSPN calculated? Is it based on daily/monthly rest? Wondering whether there is any difference between putting in small amounts of money monthly vs one lump sum at the end of the year. When is the interest for SSPN given out?

can i know whether the dividend for last year can be included for the tax relief this year? e.g. I get RM100 dividend last year, this year i've already put in RM5500, can i top up only RM400 to max the tax relief? or do i need to top up RM500?