Final pay - including payment of 2 weeks in lieu of notice period

Hi, I need to do a final pay for 2 employees who have ceased employment with us, we are paying out their 2 weeks notice instead of them working this time out.

If I add '80 hours' into their final pay, along with their actual hours worked for this last week + annual holidays won't the tax rate be incorrect (i.e it will be 1 large payment, taxed at a higher than normal tax rate).

How do I amend their tax rate so it taxes them correctly.

Or can I do 2 or 3 pay runs with todays 'payment' date, but for future periods? (i.e the next 2 weeks?)