Can i split my tax code over two jobs?
Yes, if you want to. It’s your tax allowance, so you can have it where you want. This practice was discouraged when the 10% lower rate band was in force, because that mucked things up. But now the first tax rate is Basic Rate, it won’t make any difference. Ignore answers saying you can’t do this, and contact tax office. Fengirl2 is right about amending your tax codes mid-year. It could mean you end up over/underpaid at end of tax year. You would have to have both code numbers on a month or week 1 basis, otherwise there would be a big deduction at main job on first payday after change.