No one in this user forum has access to your tax return or your information. We do not know why the IRS has changed your refund for the past several years. Did you make some mistakes? Or did you owe child support or back taxes? The IRS sends you a letter explaining why they changed your refund, but they do not send that information to TurboTax. TurboTax never knows that the IRS changed something on your tax return.
https://www.irs.gov/uac/tax-refund-offsets-pay-unpaid-debts
IRS Treasury Offset Program Call Center at 1-800-304-3107
https://www.irs.gov/uac/tax-refund-offsets-pay-unpaid-debts
https://ttlc.intuit.com/community/refunds/help/what-is-a-refund-offset/00/26301
Reduced Refund https://www.irs.gov/taxtopics/tc203
NOTE: You can contact the IRS Treasury Offset Program Call Center at 1-800-304-3107 to ask if they have an offset for you on file. TurboTax would not have that information.
https://turbotax.intuit.com/tax-tips/tax-payments/who-can-garnish-an-income-tax-refund/L7cPPzDyc