I went back and checked and I did enter the info on the W2G I received from Mississippi including the amount of MS tax they withheld in the income section of preparation section for the federal return.
I also listed gambling losses equal to the amount I won. This was before it was determined that taking the standard deduction was best for me. I assume TT handled that correctly. I checked and line 8 on the fed 1040 includes my gambling winnings from all sources including MS, it is also included on Schedule 1.
