For options writer STT and other govt. charges are same whether exercised or not?

I am confused here…it says STT is 0.05% on premium when you sell. But what if it expires in the money …will it be 0.125% like it happens with buyers?

Also if seller squares if off before expiry what will be STT and other govt. charges?

Please give an example if you can.

Is there any options calculator that considers all govt. charges and give you break even?

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