When and what rate will my SS be taxed

MFJ, I am retired and started receiving SS in February 2025. My wife has an income of $35k/yr. We have A LOT of investment dividends. We are currently only having tax withheld on my wife's income via her W4.  Should we be sending in quarterly tax payments? If so, how much? If not, how much should we set aside to pay when we file?