Alabama: https://myalabamataxes.alabama.gov/

Arizona: https://www.azdor.gov/CheckRefund

Arkansas: https://atap.arkansas.gov/

California: https://www.ftb.ca.gov/refund

Colorado: https://www.colorado.gov/revenueonline

Connecticut: https://portal.ct.gov/DRS

Delaware: https://revenue.delaware.gov/

Georgia: https://dor.georgia.gov/taxes

Hawaii: https://tax.ehawaii.gov/hoihoi/refund.html

Idaho: https://tax.idaho.gov/refund

Illinois: https://mytax.illinois.gov/

Indiana: https://www.in.gov/dor/individual-income-taxes/check-the-status-of-your-refund/

Iowa: https://tax.iowa.gov/wheres-my-refund

Kansas: https://www.kdor.ks.gov/Apps/kcsc/increfundstatus.aspx

Kentucky: https://revenue.ky.gov/Refunds

Louisiana: https://latap.revenue.louisiana.gov/

Maine: https://portal.maine.gov/refundstatus/

Maryland: https://interactive.marylandtaxes.gov/INDIV/refundstatus/home.aspx

Massachusetts: https://mtc.dor.state.ma.us/mtc/_/

Michigan: https://www.michigan.gov/taxes/iit/refund

Minnesota: https://www.revenue.state.mn.us/where-my-refund

Mississippi: https://tap.dor.ms.gov/

Missouri: https://dor.mo.gov/personal/individual/refund/

Montana: https://tap.dor.mt.gov/

Nebraska: https://revenue.nebraska.gov/

New Jersey: https://www.state.nj.us/treasury/taxation/checkrefundstatus.shtml

New Mexico: https://tap.state.nm.us/

New York: https://www.tax.ny.gov/pit/file/refund.htm

North Carolina: https://www.ncdor.gov/file-pay/refund-process

North Dakota: https://www.nd.gov/tax/

Ohio: https://tax.ohio.gov/wps/portal/gov/tax/individual/refund-status

Oklahoma: https://oktap.tax.ok.gov/

Oregon: https://revenueonline.dor.oregon.gov/tap/_/

Pennsylvania: https://www.doreservices.state.pa.us/Individual/Refund

Rhode Island: https://www.ri.gov/taxation/refund/

South Carolina: https://mydorway.dor.sc.gov/

Utah: https://tap.tax.utah.gov/

Vermont: https://myvtax.vermont.gov/

Virginia: https://www.tax.virginia.gov/wheres-my-refund

West Virginia: https://mytaxes.wvtax.gov/

Wisconsin: https://www.revenue.wi.gov/Pages/Apps/TaxReturnStatus.aspx

States without income tax: Alaska, Florida, Nevada, South Dakota, Texas, Washington, and Wyoming do not collect state income taxes.