I completed by 2020 taxes a few weeks ago. At the time, I did not receive my 2nd stimulus check. Today I received it. How to I fix taxes before Feb 12th?

I do not no how to access tax file before turbo tax sends it off. The IRS cut off payments Jan. 15th, yet I am receiving a check Feb 4th.  I do not want to get paid twice. How do I access and fix