Can any help me track down my second and third stimulus check they were mailed to my old address and ive lost track of them?

[Critter-3]

First does the IRS have your current address ?    When the checks were returns to the IRS they had no current address to send them to ... so update your address by mailing in form 8822.    https://www.irs.gov/pub/irs-pdf/f8822.pdf

Next ... put a trace on the missing payments :  https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...