Split year treatment

To whom it may concern, We are moving to uk in coming July. We have bought a home in uk which will be completed in end of this May. May I know if the income we earn before coming to uk, will be taxed in uk.

Hi
Any income you earned or gains that arise before 6 April 2023 will not be taxable in the UK.  
There is a possibility that your income/gains arising from 6 April 2023 to July when you arrive in the UK, may be taxable in the UK.  
To find out if this is the case, you will need to review your residence position and whether split year treatment applies.  
Have a look at :
Residence, domicile and the remittance basis: RDR1
and then the statutory residence tests at:
RDR3 Statutory Residence Test
Thankyou.