as others have put it this is an opportunity to reduce your state taxes it will not affect your Fed taxes
if you invested in Money Market funds then more than likely anywhere between 50-100% of the dividend paid by that fund may have been US Gov obligation. Equity funds etc will probably be much smaller if anything. CA, CT and NY have requirements that the fund have at least 50% to qualify for this exemption - see notes in docs below.
This information is readily searchable and available from the fund provider websites usually they have a tax page with "supplemental tax information" or "tax letter" for 2024, e.g. Vanguard and Fidelity here (and brokerages with their own funds may also include these %s on your 1099 consolidated statement if you had any holdings)
https://investor.vanguard.com/content/dam/retail/publicsite/en/documents/taxes/USGO_012025.pdf
https://www.fidelity.com/bin-public/060_www_fidelity_com/documents/taxes/TY24GSESupplementalLetter.p...
