I would say to declare it. The software should recognize that it's under a certain amount and it won't affect the end result (you won't be taxed on it).
The reason it matters is that you could have accounts with other banks/credit unions that have also issued interest/dividend payments. It's the accumulation of the accounts that matter. So if the aggregate meets a certain level, then you are taxed in a certain way.
Think of a yard sale. If you sell one $200 item, it doesn't really matter. You're not going to get taxed on it and submitting it is more for the completeness of your records. However, if you have 100 yard sales and sell the item at each, then yes, you would be taxed on the $20,000. It's the accumulation/aggregate over the year that the IRS cares about.
To ensure that people file their taxes correctly and don't slack on the math, the IRS has made it mandatory to file all sources of income, no matter the amount. However, just because you file it, does not mean you will be taxed on it.
