Hi everyone i received my first pay of 38 days+ 2500 GBP golden hello

Hi everyone i received my first pay of 38 days+ 2500 GBP golden hello. Gross Amount was 6722.

The tax code used is 0T and it has deducted a huge tax 1906 and National insurance 449 and pension 350.

Take home after all deductions was 3900. i checked the tax code and this 0T tax code says

“Your Personal Allowance has been used up, or you’ve started a new job and your employer does not have the details they need to give you a tax code”

How to get it sorted. ??