Retirement tax questions

So, I'm seeing this question as well on my TT for 2021. My question is, how on EARTH are people supposed to know or keep track of every single Roth IRA contribution, since inception?? Like most or many, we have had several brokerage firms managing our money, which have consolidated, merged and acquired (Waterhouse, TD, Morgan Stanley etc), all of whom had those figures decades ago. So, back to my question. How does the State of NJ expect folks to know the "exact Roth IRA contributions", from all these years past? And why doesn't Turbo Tax clarify what the heck this question is?? Nobody knows, put an explaination in the software!