For a true merit scholarship (i.e. one that has no need component), it shouldn’t matter. That said, it’s your choice whether you submit or not. If you think your financial situation could potentially change for the worse in the next few years, making you eligible for need based aid l, then I believe the recommendation is to submit these docs now.
Yes, if it’s a true merit scholarship (except at 2-3 schools that require you to submit these forms even for merit aid).
When my daughter applied several years ago, we didn’t submit either form and still received merit scholarships from all three schools that offered them.