Turbo Tax identified form 8949 to be mailed to IRS

Hello There,

 

I have completed my tax returns and filed as well for the year 2023. But later only I noticed that TT generated a form 8453 with instructions on how to mail IRS. 8453 also marked the against the form 8949. Now the questions are 

 

1) Do I need to mail the forms 8453 and 8949 to IRS?

2) How did this might have happened? I have been filing with TT for many years now and never had to do this. Please help me to be educated.