Get your taxes done using TurboTax

My return was rejected due to the AGI not matching my return from last year with the IRS! I put in my AGI number which I thought was correct a couple times bc it was on my last years return I had filed!!  So I went to my tax place from last year and got a copy of my return, and it was a different number then I had! Just a tad off!! so now I have the correct agi number and I can’t enter it cause turbo tax won’t let me??? bc I tried to many times? What Can I do to enter it now that I have the correct Agi number?? Cause it won’t let me??