[quote Bestofthebestt]@IDontWanna the school don’t think this is a possibility. Her behaviour in school is excellent.[/quote]
Masking ,especially in girls , is a thing. However that's for you to explore as a possibility, as you know her better and I'll I'm getting is a very brief snapshot.
Things to try (that don't involve putting mustard on her tongue):
Ensure her basic needs are met when she comes in from school.. water,food, rest even if it's just a chill activity or watching a video or reading.
Frame demands if possible as a choice. So she is doing her homework for example,but does she want to do it in her room or in the livingroom? She is getting washed tonight, but does she want a shower or a bath. That kind of stuff.
Really weird trick that works sometimes is ending a demand with a thank you instead of please. Tricks the brain into thinking they already agreed to do it since you're already thanking them.
When you see her getting worked up , ask her to go to her calm down corner BEFORE it's full blown tantrum. Then it's less of a punishment and more of a help thing. Plus in time hopefully she'll start realising when she needs that time herself.
Do some work with her around regulating her emotions. Identifying first... fear,anxiety,anger,tiredness,over the top excitement etc can all look the same. It's very important for children to realise them and know (even if they can't apply them themselves) some techniques that help like colouring, different breathing techniques,listening to music etc.
When she's gone past it, don't feed it, don't try to make it stop. Let it run it's course, minimum interaction, just a reminder you're there when she's done , you want to help but can't while she's screaming at you. When she finally stops then calmly talk to her about what happened, what she could've done better /what she should've done instead. She gets the attention she needs when she's calm. Her screaming is not the end of the world,won't get her anywhere and it doesn't upset/scare you.
Pick your battles. This one is very important, especially when you know she's tired/grumpy/a bit off to begin with. Pick your non negotiables, have clear rules with clear ,consistent,reasonable consequences in place.
Praise the behaviours you want to see. Be specific , not just well done or good girl. "Well done for putting your shoes on when I asked". "Thank you for listening to me". "Thank you for telling me you were sad/not feeling well/are tired." Encourage her to name and express your feelings to you.
It's not going to be easy or instant and ofc she'll still kick off , but hopefully in time you'll see an improvement.