I went to perform 'umrah and did not enter ihram at the miqat due to an excuse.
When the excuse ended, I went to at-Tan'eem, entered ihram, and performed 'umrah. Is the 'umrah valid? The 'umrah is valid.
But you should have returned to the miqat, not to at-Tan'eem.
At-Tan'eem is for someone who has performed 'umrah and is staying in Mecca and wants to perform 'umrah again, or for the people of Mecca who want to perform 'umrah.
You are not from the people of Mecca, or a clear illness, the excuse is for a woman.
You are not from the people of Mecca, so it was not allowed for you to leave the miqat.
Before entering ihram, except in one case: if you went to Mecca and you do not intend to perform umrah because you have an excuse.
That is menstruation, and you died between two umrahs, because there is a possibility you become pure, a possibility.
You did not intend umrah, and when you arrived in Mecca, you became pure.
Here, yes, you go to Taneem, enter ihram from Taneem, you go out to the area outside the sanctuary.
But if someone is coming from Kuwait intending umrah.
Then it is not allowed to pass the miqat except with the talbiyah: Labbayk Allahumma umrah, and if something prevents me, then my place of exit is where I am prevented.
Where I was prevented. But in this case, she should have returned to the miqat, whether it is al-Sayl, al-Ta'if, or another, the important thing is to return to the miqat.
Since she did not return to the miqat and entered ihram from al-Tan'eem, she must offer a sacrifice according to the majority of scholars.
She should slaughter the sacrifice in Mecca for the poor of the Haram.