I have a 2018 at line AWD Kuga I went to change the front 2 tires this morning and I was told I have to change all 4 tires can anybody tell me if this is correct??

if they're all below or near the limit (2-3mm tread depth I believe) then yes they will all need changing. seen as its an AWD car the tires will all wear at somewhat the same rate with the fronts having a bias

Thanks for that Adam just wanted to make sure I ain't getting ripped off!!

It depends where you go.  Tyre fitters at Costco tyre centres are told to change AWD tyres as a set of 4.  Most modern AWD cars are either front or rear wheel drive by default and only use AWD when traction is limited.  If you are driving in AWD, ie in slippery conditions, ideally you want all four tyres to be roughly the same tread, although 2mm difference between front and rear wouldn’t make much odds.